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When you consider the roughly 5.5" difference in barrel lengths between the two platforms, that works out to a velocity reduction of about 45 feet per second per inch of reduced barrel length. The AR15 at its heart is a rifle and carbine platform. Rainier Arms on Twitter Ive always loved these small PDW-style pistols and was lucky enough to get a couple ofCertified Used selections out of the Guns.com Vault to review. One major difference between the PDX SD and what wed normally call an integral is that the silencer unit itself can be removed. Description: .300 BLK, 115gr: 1850 FPS avg. Never been impressed with Maxim Defense products. Seriously, word play with phrases that mean the same thing in context then trying to pretend like they are somehow different. Both performed flawlessly in the PDX. The stock of the PDX appears very similar to Maxims traditional PDW stock options, but there are some significant deviations. The very first shot felt too light, like a misfire of a rifle that didnt properly cycle. The grip on the DDM4 PDW is so comfortable, and these grips are something that Daniel Defense has become known for over the years, among other things. Though similar to the PDX in size and capability, the PDX has a MILSPEC forged receiver and a different handguard. . The Hatebrake simply works to dispel gas down range and keep you on target. Be sure to follow us onFacebook,Instagram, andLinkedInfor exclusive content and deals. SUBSCRIBE TO RECEIVE OUR LATEST BLOG POSTS. Today a Maxim Defense Pdx will cost you an average of $2153.44 which is $87.94 lower than the 12-week average price. All in all, if youre looking at multiple calibers and configurations from Maxim Defense MDX Battle Rifle System, it probably exists. Ill fix that soon enough. Your email address will not be published. Finally! FEATURES: The triggers are also different on each gun. The PDX Kit uses a Direct Impingement system. Remember, at least half of flash produced has a direct correlation with ammunition selection and of course, the only thing consistent about Russian ammunition is inconsistency. By signing up you agree to Guns.com's The stock of the PDX is the proprietary Maxim SCW stock system, which reduces the stock length to 4 inches. 2023 Maxim Defense Industries. (Photo: Seth Rodgers/Guns.com). Maxim Defense MDX .300 Blackout, 8.5" Barrel, CQB Brace, Arid, 30rd. Rainier Arms specializes in high-end AR15 parts, AR15 accessories, AR15 grips, AR15 stocks, AR15 uppers, AR15 lowers, AR15 barrels and much more Maxim Defense M-RAX Attachment Rail - FDE, Maxim Defense PRS 6.5 Creedmoor Suppressor, Maxim Defense Ruger MKIV-SD .22lr Integral Suppressed Pistol, Maxim Defense MDX 510 7.62x39 Mil-Spec Complete Upper, Maxim Defense MDX 505 PDX 5.56 NATO SBR - 5.5" Urban Grey, Maxim Defense MDX 505 PDX SBR - 5.5" Black, Maxim Defense MDX 505 PDX Mil-Spec Complete Upper - 5.5" Arid, Maxim Defense MDX 505 PDX Mil-Spec Complete Upper - 5.5" Black, Maxim Defense Hate Brake Stainless DLC - Round, Maxim Defense Hate Brake Stainless DLC - Octagon, Maxim Defense MDX 508 5.56 Mil-Spec Complete Upper - 8.5", Maxim Defense M-RAX Attachment Rail - Black. Maxim Defense PDX 5.56 NATO 20+1 Round Semi Auto AR Pistol, Black - MXM47803. Were reader-supported, which means we may earn a small part of the sale from links to any products or services on this site. It may be a knock for some people that the gun only ships with a single magazine, but at least its a steel mag. This gun was designed specifically to meet the needs of Tier 1 . Kel-Tec PMR-30 Semi-Auto Pistol 22 Winchester Magnum 4.3 . 7.6239, 124gr: 1675 FPS avg. Designing the suppressor module to be removable not only makes basic maintenance like cleaning more traditional than with other integrals, importantly it means that parts can be easily and readily upgraded and replaced with newer technology down the line. $2065.50. Maxim Defense AR-15 CQB Stock With JP Gen 2 Silent. Both employ the Maxim Enhanced SCW Buffer system and the patented Maxim Defense CQB Pistol Brace. Both guns shot flat, but the PDX was especially low recoiling and stayed extremely flat due to the patented Hatebrake at the business end of the gun. OAL is available in both pistol and SBR configurations. The MD-1505 was engineered to bring our top-tier PDX package to an even more affordable price point. We quickly noticed the soft recoil from this very short-barrel pistol. MUZZLE VELOCITY 5.56 NATO, 62gr: 1965 FPS avg. Their description says more affordable, not easily affordable or any other permutation thereof. This is one gorgeous AR-style pistol. . Sign Up today for our FREE Newsletter and get the latest articles and news delivered right to your inbox. With the SCW stock, SCW brace, and SCW pistol system options, there. Its a fine grip and certainly more than capable of getting the job done. We take the systematic approach; were designing our weapons to always be suppressed. Maxim Defense SBA 5.56 NATO Ammo 62 Grain TUI Lead Maxim Defense SBA .300 AAC Blackout Ammunition 20 Round Box 115 Grain TUI Projec Maxim Defense SBA .300 AAC Blackout Ammunition 20 Maxim Defense MD9 CPS 9mm Luger AR-15 Pistol Black, Maxim Defense MD9 CPS 9mm Luger AR-15 Pistol Arid, Maxim Defense MD9 CPS 9mm Luger AR-15 Pistol Gray, Maxim Defense MD11 AR Pattern 308 Win Semi Auto Rifle. be a version available for most conceivable needs. This would probably be the biggest difference in terms of details for me. On the other hand, an AR 15 pistol, with its shorter barrel length, wont be able to generate those velocities, so you wont get the same ballistic performance. We travel nearly an hour across dry, dusty back roads in rural Idaho. Using the NATO M855 62gr ball ammo with a 1:7 . The SCW system adds a mere 4" to the end of the receiver with a full extension of 8.75", providing complete comfort . Thats more delayed blow back, roller locked or even straight blow back territory. a Rifle the T-Rex Can Actually Shoulder, No subcaliber carbine here, the Maxim PDX will be available in three calibers: 5.56, 300BLK, and somewhat of a surprise, 7.6239. $2,299.00 (Save up to 10%) Price. Another big difference I noted about the guns right away was that the PDX has an adjustable gas block, whereas the DDM4 PDW is more of a standard low-profile gas block. The trigger is an ALG Combat Trigger, which is a great trigger system with mil-spec internals. $2065.50. Military grade materials [6Al-4V Titanium, 17-4 Stainless Steel, 7075 and 6061 Aluminum] Editor of CONCEALMENT Magazine and Features Editor for the RECOIL Magazine Group, Dave Merrill has a particular passion for foreign weapons and concealable carbines. Maxims director of engineering, Patrick Tramble, ran off a laundry list of both major and minor challenges they had to overcome to produce the PDX SD. DR Exclusive Video: HK416C (also written HK 416C) "Ultra Compact Assault Rifle" SBR/PDW (Short Barreled Rifle/Personal Defense Weapon) Fired on Full-Auto at NDIA Infantry Small . This is an ultra-compact system. The primary difference is that an AR 15 pistol cannot legally have a rifle stock attached to it. If you cant, leave the damn thing alone. The PDX was one of the products born out of this transition. At the rear, the MD-1505S is equipped with our SCW Stock for the ultimate in compactness, comfort, and versatility. I only mention this because you need to practice with this pistol before you try to put it to practical use. Speaking of the handguards, you can use HK 416 compatible ones and vice-versa. ***10mm with Glawk mags has entered the chat***. At the heart of the PDX KIT is our Maxim SCW system. We started with Mk1, then Mk2, and Mk-god-only-knows before you see whats here today. Something like youd see carried by guys in black suits around important people who wanted to tuck it into a jacket or brief case. I would have loved to get a PDX chambered in .300 AAC to make it more apples to apples, but it just wasnt in the cards. Maxim Defense CCS Stock Gen 6 for AR-15 Rifles Mat Maxim Defense PDX SPS 5.56 NATO AR-15 Pistol Arid Earth. Clear as mud. The short barreled 5.56es like that always made me chuckle. I felt like I got a better grip at the front of the gun with the DDM4 PDW because of it. Need Help?service@guns.comCall (866)582-4867, PO Box 1131 13800 Nicollet Blvd Burnsville, MN 55337 2023Guns.com. The Hate Brake also pumps some gas pressure back into the system, something thats important for functionality when were talking about such short weapons. You also have the option to opt-out of these cookies. Federal Power-Shok Ammo 12 Gauge 3" Rifle ProMag FN Five-seveN 30 Round Polymer Mag HK VP9 Optics Plate #2 - Trijicon RMR / H Maxim Defense PDX 7.62x39 Pistol No Brace, Maxim Defense PDX 300 Blackout Arid Pistol No Brace, Maxim Defense PDX 300 Blackout Pistol No Brace, Maxim Defense PDX 7.62x39 Arid Pistol No Brace, Maxim Defense PDX 5.56 Arid Pistol No Brace, Maxim Defense 300 Blackout 190 Grain Subsonic, Maxim Defense PDX Kit 300 Blackout Arid Brace, Oakley 50-Snake Dagger T-Shirt Athletic Heather Grey Medium, Overwatch Precision TAC CZ P10 Black / Gold. That was not unexpected but worth noting if you want to shoot higher volumes. Then again the need for an 18.5 OAL rifle like this seems nichey. Maxim Defense wanted to develop a compact AR15 platform that would work better in confined spaces than the M4 and Mk18 while maintaining AK-47 . Handguns; Rifles; . ALL RIGHTS RESERVED. and what you get As both an experienced writer and shooter, you can find Dave's work across all RECOIL titles to include RECOIL, CONCEALMENT, OFFGRID, and CARNIVORE. Your email address will not be published. Military grade materials [6Al-4V Titanium, 17-4 Stainless Steel, 7075 and 6061 Aluminum] The NEW Maxim Defense PDX (TM) U.R.G is built to handle the fierce demands of the Tier 1 community and designed to install on any Mil-Spec lower receiver. is the ultimate choice for when concealment and personal defense is non-negotiable. The Maxim Defense PDX, which is now chambered in .300BLK, 5.56 NATO, and 7.6239, had its genesis in USSOCOM. There has been a good deal of debate over whether or not it is legal to shoulder an AR 15 pistol. Maxim Defense PDX SPS 7.62x39mm Semi Auto Pistol 5. At just 18.75 in overall length, the PDX delivers groundbreaking power and performance in a subcompact platform. The PDX employs a CQG grip from Reptilia. The debate that has gone on in recent years over the AR 15 pistol platform is related to the use of "pistol braces", which by design can mimic a rifle stock. In the specific case of the MD-1505 vs. PDS, it is more affordable. If youre looking for an AR pistol that is small and compact, these satisfy that need. Get Guns.com offers and news!! Admittedly the Hate Brake was far better in the 5.56 version of the PDX than the 7.6239. If you have considered buying an AR 15 pistol, you may wonder what the hype is, what exactly is the definition of an AR 15 pistol, and if its worth even having? This trigger has a very crisp pull and a positive and short reset. The powder burn rate for the barrel length has to be so slow it is dumping vast amounts out the muzzle. Would like the target download. An AR 15 pistol, on the other hand, is classified differently, even though they are essentially the same thing as an SBR Rifle; ridiculous I know. The BCG is slightly shorter than standard and boasts a nickel-boron bolt. 3D printers churning away. Looking at the PDX, the compact size immediately draws you in. 17 design billet lowers from primary arms are nice for 75 bucks Pop off the Hate Brake, thread on a can, and youll more than likely be totally good to go. I know that sounds absurd, but ATF regulations are hardly a place to look for logic. This website uses cookies to improve your experience while you navigate through the website. This provides easier access to the safety control. This compact system is extremely well made and well thought out. MSRP only a few 100s more then this, and INCLUDES the 3x Swarovski donut of death optic. Maxim Defense PDX 300 Blackout Arid Pistol No Brace. Ive ordered some short barrel ammo so will update after a few hundred rounds. When it comes to a gun thats stubby and stashable while also chambered in a rifle caliber, the clandestine capability also comes with an awful lot of bang. You have entered an incorrect email address! Both guns were a ton of fun to shoot. If you're looking to be a, The new 6.8x51mm cartridge adopted by the US Army. Rainier Arms on Google Maxim Defense Industries PDX, Semi-automatic SBR, 300 Blackout, 5.5" Barrel, Flat Dark Earth (Arid) Finish, Maxim Defense Hatebrake, SCW Stock System, ALG Combat Trigger, 20Rd MXM-47824Specifications You get the benefits of a reduced visual signature and a reduced noise signature without the unwieldy length of a full-sized rifle. There were giggles all around whenever it was shot on full auto. The old mixes with the new; a weathered manual mill up front, with a CNC machine in the next room. However, if you have an M16 lower or similar, any PDX upper will drop right on once you move the buttstock assembly over to your new host. Necessary cookies are absolutely essential for the website to function properly. MUZZLE VELOCITY: 5.56 1,965 fps avg (62 gr) 7.6239 1675 fps avg (124 gr) Maxim Defense PDX SPS .300 AAC Blackout Semi Auto Pistol 5.5\" Barrel 20 Rounds M-LOK Free Float Forend Arid/Flat Dark Earth. Timing is everything, and in this case Big Blue Smith & Wesson, gave Maxim the opportunity. The PDX U.R.G. If you can pull a gas block and rotate a wrench, you can swap out gas jet yourself. With that said, do not rely on the average cop to know all the specific legalities of owning and carrying an AR 15 pistol. Speaking with the reps, they said part of the requirement for this gun was that it shoot . With an AR 15 pistol, youre still not approaching the minimum rifle length of 16" when you add a suppressor. 350 Legend would be a fun caliber add in this now that Ive said it. And Maxim picked them up. they dont cost that much anymore You can unsubscribe at anytime. President and CEO of Maxim Defense, Michael Windfeldt, says, The standard way of doing business is picking the rifle, then adding the suppressor adding to the gas pressure problem. Well they were wrong. The charging handle is a Radian Raptor-LT, which is an excellent choice. Maxim Defense SBA 7.62x39mm Ammunition 20 Round Bo Maxim Defense SBA 5.56 NATO Ammo 62 Grain TUI Lead Free. That said, Im not a regular AR shooter. Maxim Defense PDX 5.56 NATO 20+1 Round Semi Auto AR Pistol, Black - MXM47803. dominates in close-quarter encounters and achieves maximum energy on target without sacrificing accuracy at distance. Something to keep in mind is that you cant shotgun the Maxim Defense PDX open like a normal carbine due to the particular buffer/BCG combination. Required fields are marked *. It gives them room to interpret the law as they please. Maxim Defense even came out with a Covid-19 version of the PDX, check it out. We tested accuracy out to 100 yards, which is probably the maximum distance for this pistol for most uses. Increased reliability due to included HATEBRAKE With lessons learned from the development of their MSX-240 suppressor that withstands the rigors of a full-auto 7.62x51mm belt-fed, along with further design insights stemming from their DSX silencer line, last year at CANCON 2022 Maxim Defense finally showed off their latest: the PDX SD. I bought this and put it on a James Madison 80% lower with a single stage trigger and cmmg parts kit. Palmetto State Armory. At just 14 in overall length, the PDX U.R.G. United States Iain may or may not be drinking beer. Back in 2019, Maxim Defense won RECOILs Best of SHOT award and also graced the cover of RECOIL Issue 41 when they released the PDX, a short 5.5-inch barreled PDW with an overall length of 18.75 inches and offered in 5.56mm, .300BLK, and our favorite in this form 7.62x39mm. This just the first taste of what's to come from Maxim Defense. HK height rail for a more rigid upper receiver Indeed something like that would be another option but I dont know that youd be able to do it in a gas operated semi auto. Check out ourDAILY DEALS pagefor industry deals and discounts. . Rainier Arms on YouTube. Plus, I really enjoyed the way the Hatebrake performed. They have now launched the new "MD-1505" to offer a more affordable AR-15-style PDX. Notify me about new product releases, reviews, and coupon codes. Were going to pair the two up and let them battle it out to let you decide which is best for you. The next size up in the MDX family is the 508. . When the stock is extended (appears to be around 5) this is about 4.5 shorter then a 16 barrel AUG. We took their new, Some of the less common but still awesome CCWs! Our Low Price. Not that the 5.56 round is a heavy recoiling round, but recoil was relatively light regardless. Inside, more than a dozen 3D printers are churning and buzzing away on new parts and prototypes. The Maxim Defense PDX comes in a few different flavors in order to satisfy most needs. Youd almost certainly end up with less muzzle flash and concussion (not to say itd be light) and youd certainly end up with better powder use. Wow! HATEBRAKE installed under the handguard Certainly would be unlikely to want to shoot any of the above indoors with out earpro. Dealers must buy through Distribution. LENGTH: 14 inch upper 4 inch SCW stock (collapsed) Features of this pistol includes a picatinny optics rail, m-lok . Military grade materials [6Al-4V Titanium, 17-4 Stainless Steel, 7075 and 6061 Aluminum] SCW Buffer-carrier. 300 Blackout, and the heavier 7.62x39mm . Theres nothing exceptional going on at least not until you step inside. The Maxim Defense PDX SPS is the culmination of years of research and development to create the best available compact PDW style firearm. theres no way maxim defense has anywhere near 1000 bucks in any of these things Id think 5.56 would have a slightly better BC but dont know that itd make a ton of difference at range. While the handguard of the PDX has integral sling quick-disconnect points, its also compatible with Maxim M-Rax accessories as well as M-Lok so you arent stuck to one location. This is merely the start of the Maxim Defense MDX Battle Rifle System. When it comes to pistol-braced, PDW-style firearms, two of the undisputed names at the top are Maxim Defense, with itsPDX, and Daniel Defense, with its DDM4 PDW. This muzzle device is vented, and Maxim has found a way to use these vents to disperse a lot of the gas and concussion downrange. Frankly, they shouldnt be given the craftsmanship and attention to detail. This patent-pending device significantly reduces recoil, decreases the flash signature, pushes gasses, and concussion wave downrange away from the operator, and improves overall performance. The grip is slightly shorter than a standard grip, which adds to its concealability. With an overall length less than 20" our PDX can fit just about anywhere! It is relatively lightweight, concealable, and chambered in great fighting calibers, namely 5.56 NATO, .300 Blackout, and 7.62x39mm. If you want the benefits of the more compact AR 15 pistol platform, there are ways to mitigate the handling and ballistics drawbacks. Looking for some last minute inspiration for that special someone, check out YETI's Valentines gift guide, it's full of great gift choices. Back in 2019, Maxim Defense won RECOIL's Best of SHOT award and also graced the cover of RECOIL Issue 41 when they released the PDX, a short 5.5-inch barreled PDW with an overall length of 18.75 inches and offered in 5.56mm, .300BLK, and our favorite in this form 7.62x39mm. Everyone raved about how great it was to shoot 7.62 rounds form a 5.5 barrel. Maxim Defense started off as a manufacturer of firearms parts, but it made the decision to transition into firearms manufacturing. At just 18.75" in overall length, the PDX delivers groundbreaking power and performance in a sub compact platform. Remember, Magpul started by making rubber pull straps for magazines, SureFire started with bulky lasers, and Daniel Defense used to only make handguards. The PDX KIT is also equipped with Maxims HATEBRAKE Muzzle Booster. A Tavor would reduce that down to 8 longer and it seems as if you can get that down to 5 difference with an SBRed version. Packaging is very well thought out. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Get Guns.com offers and news!! The Maxim Defense PDX is an answer to the SOCOM request. Maxim Defense SBA 5.56 NATO Ammo 20 Rounds 55 Grai Maxim Defense MD11 AR Pattern 6.5 Creedmoor Semi Auto Rifle. The Maxim Defense PDX in its short 18.75 configuration is smaller than the MK18, about the length of an MP5k with the stock out, but is retaining velocities closer to that of an M4/AR15 platform. 9.5 difference. Optimized Personal Defense Weapon kit This is a sleek 18.75-inch semi-automatic pistol, or SBR, depending on how you want to configure it. Its my favorite gun Ive ever owned. The shorter length of the AR pistol platform, which combines a short barrel with a brace or simply the bare buffer tube rather than a stock, makes the gun very easy to pack into a Vertx backpack or duffle bag. Seriously? Given the unique nature of this stubby shooter, it should be no surprise that nearly all of the PDX consists of proprietary parts from the gas system length to the bolt carrier group to the buffer system. A 38-inch ratchet is all you need to crank this down. . Related Article How To Buy a Suppressor | The New ATF eForms Form 4. Maxim Defense MD15 Rifles. The Ultimate Firearms Destination for the Gun Lifestyle, 2023 Recoil Magazine I was nervous because everyone told me not to go less than an 8 barrel and only in 300 blk. effective 10/03/2019. Additionally the Maxim HATEBRAKE muzzle booster reduces recoil, decreases flash . It's a small, easy to handle AR-pattern firearm that uses either Maxim's superb PDW brace in the pistol model or a collapsible stock when sold as a short-barrel rifle. I always thought maxim defense have some great looking guns and it is nice to see the price point reduced with the new line. We also use third-party cookies that help us analyze and understand how you use this website. We'll assume you're ok with this, but you can opt-out if you wish. The off position even allows for operation like a bolt gun. Buy RIP-IT Defense Ponytail Strap Black - Baseball/Softball Accessories at Academy Sports DGSTRAP-B available as low as $4.99. This is the Maxim Defense MukWerx facility, and its remoteness ensures no one will inadvertently come across what theyve been working up. A box of potatoes and another of onions in front of a large rapid prototyping machine belies the rural origins. With the SCW stock, SCW brace, and SCW pistol system options, there should now be a version available for most conceivable needs. Without a traditional rifle stock, this platform is legally considered a pistol and treated as such. Weve reported in the past that the U.S. Military is taking steps toward an all-suppressed army, and theyre starting with SOCOM. There is nice stippling treatment on the front and back straps. More on that in a minute. Details; SKU: 771894: Brand: Maxim Defense: Model Number . The PDX's gas system is adjustable/tunable at the armorer level. Back in 2019, Maxim Defense won RECOIL's Best of SHOT award and also graced the cover of RECOIL Issue 41 when they released the PDX, a short 5.5-inch barreled PDW with an overall length of 18.75 inches and offered in 5.56mm, .300BLK, and our favorite in this form 7.62x39mm. Making an AR. WEIGHT: 5 lbs I think thats the way they prefer it to be. Please read the complete description before purchasing. And with a 5.5-inch barrel? Also similar to some suppressors, youll experience some amount of free bore boost. $2,299.00 (Save up to 10%) Price. OAL is available in both pistol and SBR configurations. But the Hate Brake did an excellent job of pushing the gas and concussion forward. But first, lets talk about the manufacturer, Maxim Defense Industries. Related Article AR Pistol Lower Buyers Guide | Maxim Defense. Barrel Length: 5.5". The PDX SD is a special-purpose rifle, required to be very small and hearing safe.. The handguard also has ambidextrous QD mounts. This gun was designed specifically to meet the needs of Tier 1 military operators for CQB situations as a personal defense weapon with serious teeth. This pre-owned firearm is in good shape. The handstop is also different on each gun. Maxim Defense MDX 505 PDX Mil-Spec Complete Upper - 5.5" Black . Other Maxim Defense Pdx for Sale. Different braces, buffer tube systems, and shooting techniques such as sling tension shooting can help with the control factors while different bullet calibers and loads can improve terminal ballistics at lower velocities. They have now launched the new MD-1505 to offer a more affordable AR-15-style PDX. This is a sleek 18.75-inch semi-automatic pistol, or SBR, depending on how you want to configure it. Additionally, instead of having to use a carbine tool or some sort of thread locker to secure the short receiver extension, a simple 38-inch ratchet is used to torque everything down via a convenient socket hole on the butt. Stay Tuned to the RE Factor Tactical Blog and be part of this all VETERAN-run website. If I had to choose just one, I would choose the Maxim PDX because its chambered in the more affordable 5.56, which would probably lead me to shoot it more. Kel-Tec PMR-30 Semi-Auto Pistol 22 Winchester Magnum 4.3 Barrel 30-Round Magazine $ 449.99 . Their description says, affordable or any other permutation thereof. FINISH: Arid Earth and Black in color Type-III Hard Anodizing, Puerto Rico Customers: Consumers must go through your local PR dealer. Fit and finish are excellent, best of any AR platform Ive purchased. **The Maxim PDX U.R.G ships with your choice of a Standard Mil-Spec BCG to be . The biggest difference in terms of comparison between these guns is obviously the caliber. All Rights Reserved. Youd also have a gun thats not strictly RH too. Designed to be installed on any Mil-Spec lower receiver, SPECIFICATIONS: Maxim Defense AR-15 Gen2 JP Silent Capture 9mm Buffer And Spring For Maxim Defen Maxim Defense AR-15 Gen2 JP Silent Capture 9mm Buf Maxim Defense PDX SPS 5.56 NATO AR-15 Pistol Black. The gas block has a threaded jet port which allows for custom tuning of the gas flow. So far as what a PDW should be capable of this one is no slouch. Maxim Defense PDX 5.56 NATO 20+1 Round Semi Auto AR Pistol, Black - MXM47803. While the preproduction models have receivers unmarked and unmarred by caliber markings, production guns will have the caliber deeply etched right on top of the forward assist. As low as $149.92. The price point will not be for everyone. So, then they [DoD] ask for a lower-flow suppressor. You may be scratching your head at the 20+1 capacity from the PDX. Maxim Defense spent the following years developing a fix for this next part of the problem making it more stealthy with all the blast and gas.