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No matter what kind of .300 BLK build you want to create, you can find the upper for it from PSA. The uppers all feature different-length handguards that accommodate the mounted flash suppressor. It may be on the heavier side because they like heavy barrel profiles, but there's Faxon with a pencil barrel if you want it to lose weight. 2 models Ballistic Advantage Performance Series .300 Blackout for AR-15 Rifle Barrels (4) As Low As (Save Up to 18%) $179.49 Free 2 Day Shipping Anderson Manufacturing 10.5in 300 AAC Blackout Pistol Kit Upper $197.99 (Save $18.00) $179.99 4 models Rainier Arms AR Select 300BLK Barrel $209.99 (Save Up to 10%) $195.00 Final Sale JavaScript seems to be disabled in your browser. 300 AAC Blackout Upper Assembly Palmetto State Armory 10.5" Complete Upper Receiver Kit. Type your email address and well send I haven't had any issues with the 416 stainless barrel. With that said, weve had 50 years or so to optimize the system, and that is exactly what has happened with the .300 BLK round. The 16" barrel has a 1-8 twist rate and a Type 3 Hard Anodized - Black Finish. That is far as train with a 8.5" it is a CQB set up. (AAC Photo via Department of Defense), The .300 Blackout gives you better short-barrel performance than a traditional 5.56 NATO. With this guide in hand and a little bit of thinking, youll be well on your way to an excellent .300 Blackout pistol or rifle. PSA does it again with sub-$200 uppers that work. Get proficient on YOUR time. So if compactness is the name of the gamemake sure you have a suppressor to add some backpressure and also enable you to run a longer handguard. To view this site, you must enable JavaScript or upgrade to a JavaScript-capable browser. or something you wish we had, please let us know! Home Default Category Upper Assemblies 300 Blackout. DS-15 Complete Upper 16" MOE .300 Blackout Non-Threaded Black FDE $ 599.95. For the best experience on our site, be sure to turn on Javascript in your browser. If you would like to proceed without signing in, you can checkout as a guest. I have to say that I am impressed with the quality of their products. It has a longer range than .300. From steel-cased Wolf range ammo to brass supersonic and 220gr subsonic rounds. What to look for in a Quality .300 Blackout Upper, Aero Precision M4E1 Assembled Upper Receiver, A Ballistic Comparison of 5.56x45mm vs. .300 AAC Blackout, The American Firearms Guide to Shotgunning. I swapped a few uppers out with the Pro2A and was surprised by how well it locked up with my various lowers. It also requires 9mm-specific components and you still end up with a sub-par AR full of compromise (or more of a PCC). All rights reserved. Though these bullets are delivered at a lower velocity, the .300 Blackout's lower chamber pressure and fast-burning powder allow for shorter, lighter barrels ideal for close combat. Shop BCM 300 Blackout AR uppers. Originally chambered in .308 as the AR10, Eugene Stoner made a rifle that was chambered for a round that was full of compromises, the 5.56 NATO. In my opinion, the two rounds are designed for different tasks, and having both simply opens up your options. Learn More. Shop Aero Precision. Quick View. BCM BFH 16" Mid Length (Light Weight) Upper Receiver Group w/ MCMR-15 Handguard $780.00 Out of Stock. As Low As (Save Up to 11%), As Low As (Save Up to 16%), Tacfire AR-15 5.56/.233/.300AAC Stripped Upper Receiver w/M4 Feed Ramps, As Low As (Save Up to 13%), Sharps Bros SBUR04 Billet Upper Stripped With Forward Assist & Dust Cover Black, Tiger Rock Nitride BCG Gen 2 And AR-15 Side Charging Billet Upper Receiver, Radical Firearms RF Upper Assembly 8.5in 300 AAC HBAR Contour w/ A2 Flash Hider, TRYBE Defense AR-15 10.5in Semi-Complete Upper Receiver, As Low As (Save Up to 41%), XTS AR-15 8.5in 300 BO Complete Upper Receiver, As Low As (Save Up to 17%), Ghost Firearms Vital .300 Blackout Upper Receiver, CBC Industries AR-15 Upper Assembly, 300AAC, 16in, Radical Firearms RF Upper Assembly 16in 300 AAC HBAR Contour w/ A2 Flash Hider, XTS AR-15 16in 300 BO Complete Upper Receiver w/ 12in Rail, As Low As (Save 15%), Grid Defense .300 Blackout Upper Receiver, As Low As (Save Up to 28%), XTS AR-15 8.5in 300 BO Complete Upper w/ Ce Rail, TRYBE Defense AR-15 Pistol 10.5in Upper M-LOK, .300 Blackout, As Low As (Save Up to 47%), TRYBE Defense AR-15 Semi-Complete Upper Receiver, As Low As (Save Up to 35%), Ghost Firearms Elite Complete Upper Receiver, .300 Blackout, 10.5in, Pistol , 4150 Light HBAR Barrel, 1-8 Twist, 9in M-LOK Free Float Hand Guard, A2 Flash Hider, Flat Dark Earth, XTS AR-15 16in 300 BO Complete Upper Receiver, As Low As (Save Up to 15%), XTS AR-15 10.5in 300 BO Complete Upper Receiver, Radical Firearms 16 in. Looking for a 300 blackout upper receiver for around $300. It's also great for self-defense. Enjoying your AR reviews. In Stock. The bullet does not fully seat in the chamber, it just seems like it does due to the exact lengths involved. Fast Shipping Same day shipping when order is placed before 1PM EST. The lightweight aluminum handguard (M-Lok compatible) is a nice touch, lightening the load if you're thinking about stalking deer. LAR-15M Complete Upper Halves .300 AAC Blackout. Short little pistols? #20 Radian Weapons Model 1 .300 AAC Blackout Complete Upper Receiver #21 Radical Firearms 16 in. LAR-15M .458 Uppers. [email protected] US. Our collection of 300 Blackout ACC uppers include Aero Precision uppers, Radical Firearms uppers, Ghost uppers, and tons of other AR upper receivers from the brands you know and love. With the already short length here, the best application for this upper would be to add a short suppressor and use subsonic ammunition. This would be for an 8" barrel. All Rights Reserved. The Faxon Firearms AR-15 Barrels .300 Blackout Gunner Profile comes in three distinct barrel lengths, two pistol barrels at 7.5 and 10.5 and a legal carbine 16 barrel. Radical Firearms integrally suppressed uppers are designed for simple rifle enthusiasts. 300 Blackout uses the same bolt carrier group (BCG), lower, and magazines as 5.56 NATO and 223 Remington, making it extremely easy to add a new caliber to your arsenal! I soaked up as much information as I could online, at competitions, and from tinkering in my workshop. Shoot a large variety of grain weights with exceptionally well performance with subsonic ammo and suppressors. Rating: Special Price $369.99 $509.99. AR-15 Complete Uppers $489.00 $2,060.00 AR-15 Complete Uppers We have AR-15 complete upper receivers for every occasion. You can use the 5.56/233mags with the 300blk and the bcg, but that's it, so eaither buy a upper chambered in 300blk or swap barrels. Maximize your rifle's potential with the best 300 Blackout Upper receivers that offer exceptional accuracy, durability, and customization. Ships out in 2 days on all Non-FFL items, 6 days for FFL items. 300 Blackout Barrels for sale at Primary Arms from a variety of popular brands like BCM. 8.3" .300 Blackout BA Hanson Pistol Length Performance W/7" AR15 ATLAS R-One M-LOK Handguard Complete Upper . The 110-grain rounds are supersonic, and the 220 subsonic. Primary Weapons Systems MK109 Piston Upper (9.75" 300 Blackout Barrel) $1,029.49 - $1,299.95 Out of Stock Seekins Precision Seekins Precision NX8 .300 Blackout 8" Complete Upper Assembly $899.00 $855.00 LEO and MIL First responder discount available. The pistol upper has a 10.5" barrell with a 12.62" free float hand guard. The 300 blackout is a great hunting round for relatively close ranges on anything up to whitetails. The rail covers are a nice, quality touch. During the data transfer we were unable to preserve nicknames, authors, or helpful scores for older reviews. A 10-inch barrel on an AR pistol or SBR rifle is perfect for the ballistics of 300 Blackout. LAR-9M Complete Upper Halves .9mm Luger. The rifle performance is amazing. Can we get an updated for 2022 article? Select options Quick View. 2022 S CROCKETT The 300 BLK (300 AAC Blackout) was developed as an upgrade to the 5.56 NATO, using fast burning powder to eliminate powder flash.300 Blackout will operate either supersonic for long range application, or subsonic and suppressed for close quarters engagements. The .300 Blackout cartridge is available . Msg & data rates may apply. Rating: Special Price $379.99 $519.99. My only issue is with the buffer tube and and exploding gas tube but both are my fault. Unfortunately your form was not successfully submitted. Davidson Defense "Golden Eagle" AR-15 Upper Receiver 16" .300 Blackout 4150 CMV QPQ Nitride 1-8T Barrel 15" M-Lok Handguard (Assembled or Unassembled) $504.99 $219.99 Sale In Stock. $494.00. Also, with option for stainless steel or 4150 with Nitride finish barrel. If you want to get a little pickier, go with an adjustable gas block or one that's long enough to allow you to slide an adjustable gas gadget under the hand guard and that pokes out a little to let you adjust it. Mil-spec parts - American Made. $ 220.99 - $ 300.98. Aero Precision is one of the best companies out there for modern, high-quality AR components. Bolt Carrier Assembly for SIG M400 Upper Receivers $199.99 Add to Cart Restricted in some areas UPPER RECEIVER ASSY, MPX, SEMI, DUST COVER, EJECTOR, BARREL CLAMP, HARDWARE $549.99 Add to Cart Restricted in some areas New! The .300 Blackout carries a .30-caliber bullet that offers greater mass than a .223 Remington's .22-caliber projectile. $99.99 $71.99 Sale. I slept 11 hours the first night. These 300 Blackout uppers all feature different-length handguards and are all equipped with a standard A2 muzzle brake that's been proven efficient and effective. It costs less than equivalent uppers from some major brands. Learn More. Please tell me the make and name of the two AR-15 300 blackouts shown in the picture with the description "Suppressed .300 Blackout" Add to Cart $229.95 $399.95 AR-15 300 AAC blackout 10.5" nitride classic mlok upper assembly AR-15 300 AAC blackout 10.5" classic mlok upper assembly is a perfe. Get discounts from top brands and our latest reviews! 300 Blackout Uppers Drop in ready 300 blackout complete upper receivers available today. . 300 Blackout Upper For Sale | Primary Arms 300 Blackout Upper for AR-15s for sale. Instead, we want a short-barreled rifle or pistol that, especially when paired with a suppressor or muzzle brake, can lead to a handy and quiet rifle that still makes more impact than a 9mm, and in most cases, more than 5.56mm. I haven't tried it, but it seems implausable. I just built a Classic Firearms (Bear Creek Arsenal) .300blk 16" stainless barrel with an Anderson upper. Cant beat it. I may earn a small part of the sale from links to any products or services on this site. It ate everything I put through it and shot as well as any other 10.5-inch upper in my collection. SHERMAN, TX. Aero Precision M4E1 Assembled Upper Receiver .300 BLK. First of all, a little legalese will be necessary here. 16 option works for rifle or pistol build. If youre in the market for a quality upper and are bored with shopping big-boy retailers, check out Pro2A Tactical. By subscribing to Bear Creek Arsenal (BCA) text messaging on 87462, you agree to receive recurring autodialed marketing text msgs (e.g. Out of stock. Learn more at. Sign up for our newsletter for exclusive promotions and a coupon for 10% off an order! Shoot a large variety of grain weights with exceptionally well performance with subsonic ammo and suppressors. That open handguard design, as much as it keeps weight down and helps with thermal performance, may come at the cost of heat transfer to your hands, so think about some gloves when shooting this one. Preferably 9" barrel. Nav Menu 8. the next step on your AR is to upgrade to a 300 Blackout upper, Ghost Firearms Elite 16" Upper .300 Blackout - Black, ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - BLACK, ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER - BLACK ANODIZED, Ghost Elite 16" Upper .300 Blackout - FDE, GHOST FIREARMS ELITE 10.5" UPPER RECEIVER - .300 BLACKOUT UPPER - FDE, ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - MAGPUL FDE, Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - FDE, Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - Black Anodized, Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - FDE, Ghost Firearms Elite 16" Upper .300 AAC Blackout - Olive Drab, Ghost Firearms Elite 10.5" Upper .300 Blackout - Burnt Bronze, Ghost Firearms Elite 16" Upper .300 AAC Blackout - Blue Titanium, ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER - MAGPUL FDE, Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - Black Anodized, Ghost Firearms Elite 7.5" Upper .300 Blackout - FDE, Ghost Fireams Elite 10.5" Upper .300 Blackout - OD Green, Ghost Firearms Elite 10.5" Upper .300 Blackout - Blue Titanium, 7.5" .300 Blackout Flash Can Upper Receiver With 10" MLOK Hand Guard, Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - OD Green, Ghost Firearms Elite 7.5" Upper .300 Blackout Blue Titanium, Ghost Firearms Elite 10.5" Upper .300 Blackout - Tungsten Gray, Ghost Firearms Elite 16" Upper .300 AAC Blackout - Tungsten Gray. Upper Bavaria ; Munich ; Munich B&Bs / Inns ; Hotel Beer; . Davidson Defense Premium Left Handed M16 AR-15 Black Nitride Finish Bolt . The short, stubby round, the .300 BLK, gives you improved performance over the 7.62x39mm at 300 yards. the next step on your AR is to upgrade to a 300 Blackout upper, Ghost Uppers from ghost firearms. Unfortunately, the item(s) selected is out of stock. In addition, the receiver itself is built out of 7075-T6 aluminum and has a hard-coated anodized finish. MSRP: Your Price: $743.49. We'll send you the latest guides and training tips geared that accommodate the mounted flash suppressor. I had initial problems with using an upgraded WMD NiB BCG, but once I switched back to a mil-spec BCG it ran everything like a champ. It comes with a flash hider, but I recommend fitting a suppressor on it as the length just screams for a can and hand stop. - Permanently Attached 19 Baffle Titanium Suppressor. Radical firearms also produce their uppers in a wide variety of configurations. Founder & Licensed Concealed Carry Holder. The .300 BLK has easily been the most successful new caliber in the last 20 years. Add to cart. Still need? The .300 BLK also reaches peak ballistic potential from a 9-inch barrel. When it comes to a bad-breath-distance engagement, we want a .300 blackout. My editors pick recommendation for a do-all .300 BLK upper. Out of stock. CHAINSAW, UPPERS, AR-15, 5.56, 300BLK. It's everything 300 Blackout supersonic wishes it was. Same story with my 16" rifle. Doing that will let you shoot .300 Blackout indoors without totally ruining your eyes and ears: this makes the DDM4 300s a great entry into this new caliber. I built mine from Anderson Mfg. To keep gas out of your face, you may want to choose one of the new flow-through, 3d printed suppressors from OSS/HuxWrx. Another proven company for complete uppers. The AR world is absolutely massive, and you can chamber an AR in everything from .22 LR to .45-70 Government. Since we think a high-quality .300 Blackout does so well suppressed, we think a pistol upper with a threaded barrel is the perfect way to get the best out of the round. Recoil Technologies AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group. And be sure to snag a bufferless Picatinny end lower receiver. The Anderson Manufacturing 300 Blackout Complete Upper Receiver is a great way to quickly and conveniently build out, or change an existing AR-15 to shoot the popular 300 Blackout round. Thx! Legacy Reviews were written prior to the latest upgrade of our Review System. our price: $369.99 . One of our trained professionals will get back to you within the next 24 hours. In stock (Only 6 left!) I bought the 8.5" Radical Arms upper for my SBR. Just swap the barrel and gas system and commence pow-pow. upper and lower at a price cheaper than any previous AR Buildvery satisfied with the quality of each component. Pretty old article, all of the mentions of keymod give it away, as the industry has moved to the magpul standard m-lok. Sig is attaching these to the new Army rifles running 6.5. Thanks! And its pistol-length gas system ensures reliable cycling with whatever it's fed. Deals Den Out of Stock. Go the folded brace route with a BRN-180 upper. Show Filters Showing all 12 results. towards your level. Just make sure and meet ATF's guidelines for AR-15 pistols. Enter your email address for special offers from MAS Defense LLC, ATF Rule 2021R-05F - 80% Lowers 09-27-2022, ATF Rule 2021R-05F - 80% Pistol Frame Update 12-27-2022, ATF Rule 2021R-08 - Stabilizing Braces 12/28/2022, 6" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE MIL SPEC BARREL NUT, 6" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 7.25" M-LOK RAIL, 6" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE RIDGELINE 7.25" M-LOK RAIL, 6" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE SQUADRON 7" LIGHTWEIGHT QUAD RAIL, 7.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE MIL SPEC BARREL NUT, 7.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 7.25" M-LOK RAIL, 7.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 7.25" M-LOK RAIL - FDE, 7.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 9.87" M-LOK RAIL, 7.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 9.87" M-LOK RAIL - FDE, 7.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE RIDGELINE 7.25" M-LOK RAIL, 7.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE RIDGELINE 9.87" M-LOK RAIL, 7.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE SQUADRON 7" LIGHTWEIGHT QUAD RAIL, 7.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE SQUADRON 7" LIGHTWEIGHT QUAD RAIL - FDE, 7.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE SQUADRON 9.87" LIGHTWEIGHT QUAD RAIL, 7.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE SQUADRON 9.87" LIGHTWEIGHT QUAD RAIL - FDE, 8.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE MIL SPEC BARREL NUT, 7.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE SQUADRON 12" LIGHTWEIGHT QUAD RAIL, 8.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 7.25" M-LOK RAIL, 8.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 7.25" M-LOK RAIL - FDE, 8.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 9.87" M-LOK RAIL, 8.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 9.87" M-LOK RAIL - FDE, 8.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 12.62" M-LOK RAIL, 8.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE RIDGELINE 7.25" M-LOK RAIL, 8.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE RIDGELINE 9.87" M-LOK RAIL, 8.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE SQUADRON 7" LIGHTWEIGHT QUAD RAIL, 8.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE SQUADRON 7" LIGHTWEIGHT QUAD RAIL - FDE, 8.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE SQUADRON 9.87" LIGHTWEIGHT QUAD RAIL, 8.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE SQUADRON 9.87" LIGHTWEIGHT QUAD RAIL - FDE, 9.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE 12.62" MW8 OCTAGON M-LOK RAIL, 10.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE MIL SPEC BARREL NUT, 10.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 9.87" M-LOK RAIL, 10.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 9.87" M-LOK RAIL - FDE, 10.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 12.62" M-LOK RAIL, 10.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 12.62" M-LOK RAIL - FDE, 10.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE RIDGELINE 9.87" M-LOK RAIL, 10.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE RIDGELINE 12.62" M-LOK RAIL, 10.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE 12.62" MW8 OCTAGON M-LOK RAIL, 10.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE SQUADRON 9.87" LIGHTWEIGHT QUAD RAIL, 10.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE SQUADRON 9.87" LIGHTWEIGHT QUAD RAIL - FDE, 10.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE SQUADRON 12" LIGHTWEIGHT QUAD RAIL. Weve got a dedicated section for the AR-15 here. I wont dive too deep into the 5.56 vs. .300 Blackout debate because we have an article on that. See. to cause cancer, birth defects or other reproductive harm. With suppressors and SBRs being all the rage, the .300 BLK continues to grow. Besides the easy conversion between 5.56 and .300 BLK, the .300 BLK does a lot the 5.56 can't. First off, it's a very versatile load with projectiles weights ranging from 110 grains to 220 grains. SHOP Pro2a Tactical's huge selection of AR-15 complete uppers in a variety of calibers - 223/5.56, 300 Blackout, 7.62x39, 6.8 SPC II, 6.5 Grendel, 6mm ARC, 450 Bushmaster, 50 Beowulf (12.7x42), 458 Socom, 224 Valkyrie. That is what will happen!!! Check out our full review of the 16 5.56 version. Personalize your experience. Copyright 2023 Pew Pew Media, Inc. All rights reserved. 300 Blackout Ammo is one of our most popular calibers. BCM. Out Of Stock. Sale! Offering 5.56 NATO and 300 Blackout options, the Radical uppers offer a free-floating m-lock hybrid rail with a M4 military standard upper receiver forged with 7075 T6. Running windowed PMAGs in my .300BLK PSA PA-15. Nav Menu 6. Awesome products by an awesome seller. It is also much more maneuverable in tight conditions. The circa 2011 Advanced Armament Company's .300 Blackout AR-15 platform, achieving impressive performance from just a 9-inch barreled SBR. The 300 Blackout AAC Rifle Assembled Upper Receivers come in 16" Barrel Length. All. SBR? This is a well-documented issue with .300 BLK and 5.56. Consent is not a condition of purchase. G19; 1911.300 Blackout.300 Blackout Complete Uppers . Very smooth and the accuracy is excellent with just irons. There is also a good selection of the lightest AR-15 handguard configurations available. PSA is also, generally, one of the most budget-friendly options. We'll cover the best uppers out there for all budgets and build typesfrom pistol to rifle to suppressed. 300 Blackout Uppers | 300 ACC BLK Uppers from Top Brands like Aero Precision, Radical Firearms & More, 300 Blackout Uppers | 300 ACC BLK Uppers from Top Brands like Aero Precision, Radical Firearms & More, 164 products / 697models. Please be cautious when considering offers from individuals offering you items. 21 models Grid Defense .300 Blackout Upper Receiver (1) As Low As (Save Up to 28%) $285.99 5% Bonus Bucks XTS AR-15 8.5in 300 BO Complete Upper w/ Ce Rail $334.99 (Save 15%) $285.99 Final Sale 3 models TRYBE Defense AR-15 Pistol 10.5in Upper M-LOK, .300 Blackout (7) As Low As (Save Up to 47%) $289.99 Blazin' Deal . Want to go a little different? Home > PRODUCTS > BARRELED UPPER (NO BCG/CH) > .300 BLACKOUT: MHR RPR Like Radical Firearms on Facebook. The new upper chambered in the ever-so-chic 300 blackout (300blk) fits the SIG MCX and a standard AR15 lower. Along with the 300 Blackout Upper, we also have a variety of Handguards and different finishes. 300 HAM'R leads the way. 13.7 GEN 3 INFIDEL UPPER $ . I chose it both for price and the handguard was the 1.5 inch slick tube.