My personal favorite is the 8.5-inch upper with an MLOK rail. AR15 300 BLK upper receivers are a great way to change to a larger caliber without the need for a ton of new parts. guns & The .300 BLK has easily been the most successful new caliber in the last 20 years. Description. to cause cancer, birth defects or other reproductive harm. . Learn More. For pistol uppers, Palmetto State Armory has put together a sweet offering here. Mil-spec parts - American Made. Type your email address and well send Along with the 300 Blackout Upper, we also have a variety of Handguards and different finishes. 300 Blackout Uppers Drop in ready 300 blackout complete upper receivers available today. 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. From steel-cased Wolf range ammo to brass supersonic and 220gr subsonic rounds. MEDIA; Nav Menu 3. Here are some pictures that more clearly show it happening: Cut-Away and article, https://uploads.tapatalk-cdn.com/20160501/d175a60f384060cfabc4c555b349fd4f.jpg. 3 models Spikes Tactical 300 Black Out 10in Forged Upper Receiver As Low As (Save 10%) $872.10 Final Sale. $364.99. 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. One such round is the .300 Blackout. CLICK HERE We'll cover the best uppers out there for all budgets and build typesfrom pistol to rifle to suppressed. This includes magazines, bolt carrier groups, upper and lower receivers, rails, buffers, buffer assemblies, stocks, etc. For the best experience on our site, be sure to turn on Javascript in your browser. A2 receiver and stock. Rating: 100%. CLICK HERE Texas independence day Sale ended ended 00hrs 00mins 00secs The fit on a variety of lowers was tighter and had less play than pistol uppers that had been paired with their lowers from the factory impressive! Add to cart. Quick View. Those longer barrels make them more cumbersome when it comes to close-range applications like home defense. I haven't tried it, but it seems implausable. Check. a huge part of .300blk's appeal is the ability to spit out heavy ass bullets at a pretty low velocity, probably cycling issues with subs/suppressors. 300 AAC Blackout Upper Assembly Learn More. Weve built dozens of ARs and well cover all the best AR-15 upgrades such as handguards, triggers, BCGs, gas blocks, and more. Lightweight, compact, maneuverable, this integrally suppressed upper is able to serve in . It is also much more maneuverable in tight conditions. Anything that makes them stand out? These uppers arent the fanciest, but they work. AR15Parts.com Nav Menu 7. 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. These are just my favorites and represent a very small section of the market. Because it moves slower, its also a lot quieter: this makes .300 blackout a great choice for a good flash suppressor, a silencer, or a muzzle brake, which requires a threaded barrel. 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. .300 Blackout Complete Uppers .300 Blackout Barrels AR 9MM 9MM Rifle Kits 9MM Pistol Kits 9MM Complete Uppers 9MM 80% Lowers 9MM Uppers 9MM Barrels 9MM Parts Handguns 1911 G19 Accessories & Optics Jigs My account Cart. Only drawback is they force you to buy a BCG and charging handle with an upper only purchasesince I already own a DDM4 V7 Pro I didnt much like having to pay the extra money for what I already owned. DS-15 Complete Upper 16" MOE .300 Blackout Non-Threaded Black FDE $ 599.95. The same thing can be said for home defense in a .300-chambered AR replacing pistol caliber carbines lots more stopping power with little fuss. . shooting 5.56 in a 300blk will not explode - but your guess is as good as mine where the bullet goes . DS-15 Complete Upper 16" MOE .300 Blackout Threaded Black $ 599.95. Pretty old article, all of the mentions of keymod give it away, as the industry has moved to the magpul standard m-lok. Customize your 300 BLACKOUT Complete Upper with an optic, muzzle device, rail, bolt carrier group, magazine, or charging handle from our matched selection. #20 Radian Weapons Model 1 .300 AAC Blackout Complete Upper Receiver #21 Radical Firearms 16 in. You wont find a piston system as compact as the rattler anywhere. Upper Builds > .300 Blackout Compatible. Nav Menu 4. $ 220.99 - $ 300.98. 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 No BCG or Charging Handle required. 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! Market monitoring: Aero precision Upper complet 8'' pour carabine Semi Auto M4 cal .300 Blackout M-Lok This question comes up a lotand the answer varies depending on your end use and if youre using a suppressor. Unfortunately your form was not successfully submitted. Special Price $339.99 $479.99. Please be cautious when considering offers from individuals offering you items. Your form has been submitted. Same story with my 16" rifle. Quick view. The round simply doesnt perform at range they way a 5.56/223 round. 8 barrel option is perfect for a pistol build, Standard flash hider isnt pinned, so you can add a suppressor or muzzle brake, Doesnt come with a bolt carrier group or charging handle. We also love their 5.56 uppers check out the review. Rating: Special Price $369.99 $509.99. Home > PRODUCTS > BARRELED UPPER (NO BCG/CH) > .300 BLACKOUT: MHR RPR Like Radical Firearms on Facebook. Conclusion. Have been looking at all the AR variations and would like your thoughts/advice on a particular package I'd like to build - .300BO, 16" 1:8 barrel, gas piston, and side-charging upper. The .308 is a larger round, providing more energy and penetration than the .223/5.56 round. First off, its a very versatile load with projectiles weights ranging from 110 grains to 220 grains. Its a heavier, slower-moving round, but thanks to the .30 caliber bore, will burn its full potential in a 9-inch barrel. Get your .300 BLK barrel and build your AR pistol today. As you can see in the image above, bad things can happen when you load the wrong cartridge into your rifle. 10.5 GEN 3 SHORTY UPPER $ - $ Select options. Want to go a little different? They are mil-spec, and all feature flat top uppers, forwards assists, and threaded barrels. While the .223/5.56 NATO (yellow mag) generally runs 55 to 77-grain bullets, the chunky .300 BLK (black mag) starts at about 100 and goes all the way up to around 220-grains. These budget-priced uppers lack a BCG and charging handle, but theyll take any standard AR BCG and charging handle. Maximize your rifle's potential with the best 300 Blackout Upper receivers that offer exceptional accuracy, durability, and customization. G19; 1911.300 Blackout.300 Blackout Complete Uppers . For the .300 Blackout, shorter is better. 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. If this is your first build and you've chosen one of our recommendations above, then you're off to a great start. 2022 S CROCKETT The PSA 8.5 .300 Blackout is a solid upper receiver if you are looking for a compact pistol length option. if it doesn't engage the rifling it doesn't fly straight. Msg & data rates may apply. 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. A subsonic round is much easier to suppress and much quieter when suppressed. Upper Build Starter Kits > .300 Blackout Compatible. Your Price: $450.49. (, We noticed that you have previously logged in with your, Check what do you get by creating an account, Bookmark and compare your favorite firearms, While thats cool when it happens, whats even cooler is when rounds are, First off, its a very versatile load with, I wont dive too deep into the 5.56 vs. .300 Blackout debate because, A 10-inch barrel on an AR pistol or a short-barreled. Payment sent. With that said, all of the options on this list are good, and we think you could make a great pistol or rifle out of any of them: we recommend thinking about the parts you already have and what you want to do with them before making a purchase. BCM MK2 Standard 9" 300 BLACKOUT Upper Receiver Group w/ KMR-A8 Handguard. 16" 556 Upper with 15" MLOK Hand Guard (0) $295.99 On sale: $275.95 Sale Out of Stock. ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER WITH STAINLESS STEEL BARREL - BLEMISHED $279.00 ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER - RIDGEWAY BLUE Now: $219.00 Was: $299.00 ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER - SMITH & WESSON RED Now: $219.00 Was: $299.00 Now: $219.00 Was: $299.00 Account Gift Certificate balance will not be available. 300 blackout is designed as an SBR suppressed cartridge you have no need for a barrel longer than 16. I pick up boxes of 20 at Walmart for 15$ and some change. Check out our full review of the 16 5.56 version. I love Ballistic Advantage 5.56 barrels (full review) for the right mix of performance and affordability. BCM Standard 14.5" M4 (SOCOM) Upper Receiver Group W/QRF 7 Quad Rail $610.00 We asked Clint Hanson, the founder of Ballistic Advantage, and his go-to barrel length is 10. inches for reliability. 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. .300 BLACKOUT; 7.62x39; BARRELED UPPER (NO BCG/CH) 5.56 NATO.300 BLACKOUT; 7.62x39; SUPPRESSORS. News people Radial pistol uppers are good to go for what they are designed to do. Any u guys can recommend or recommend staying away from? I chose the 10.3-inch Hanson barrel factory upper to be my trunk gun, where I valued reliability without needing a suppressor to add back pressure. This AR15 upper receiver assembly comes ready to attach to any Mil-Spec lower receiver. The .300 BLK also reaches peak ballistic potential from a 9-inch barrel. A 10 and 1/2 in barrel is okay. For the best experience on our site, be sure to turn on Javascript in your browser. Your 300 BLACKOUT AR 15 Upper Receiver will arrive turn-key and ready to shoot out of the box. That is what will happen!!! We sincerely value the suggestions and feedback of our visitors. Interested in a one-stamp, integrally-suppressed blackout upper. As usual, great article. I may earn a small part of the sale from links to any products or services on this site. And at close range, the 5.56mm, frankly, is an awful round. To view this site, you must enable JavaScript or upgrade to a JavaScript-capable browser. While not pistol-length, my DDM4A1 uses the same quad-rail, and it's worth every penny. SBR? Youll need to bring your own BCG and charging handle but for those who know and rely on the Aero brand and want to keep it short, this is a quality upper. Plus no nose bleeds from slapping yourself in the face when your hand slips. Reply HELP for help and STOP to cancel. In stock (Only 6 left!) Get 10% Off - Subscribe to Our Email List, Please check your email for confirmation message. 300 Blackout Barrels for sale at Primary Arms from a variety of popular brands like BCM. BC-15 | .300 Blackout Upper | 10.5" Parkerized Heavy Barrel | 1:8 Twist | Pistol Length Gas System | 9.5" MLOK 43 Reviews $249.99 Add to Cart BC-15 | .300 Blackout | 7.5" Parkerized Heavy Barrel | 1:8 Twist | Pistol Length Gas System 6 Reviews $68.99 Add to Cart Load next We Recommend These Products Just For You! I have 9.5" (threads make it 9.5") ballistic advantage barrels I can make into upper. The AR is often adapted to function in calibers it was never designed for shooting. In my opinion, the two rounds are designed for different tasks, and having both simply opens up your options. The 10.3-inch length is not too short and not too long from an all-around/fit every human size standpoint because you have to figure in the handguard and potential suppressor length. All our side charging and standard charging 300 blackout uppers are compatible with mil-spec. I suspect the market for that is just too low. Ammo. 300 Blackout upper (0) $315.00 On sale: $289.95 Sale Out of Stock. But we all love a good brace! . You do not pay anything extra and your purchase helps support our work. Founder & Licensed Concealed Carry Holder. Buy a 300 BLK upper receiver today, and make sure to check out all of our AR 15 parts to shop for high-quality gear for your other ARs. Otherwise barrel length doesn't matter, when you start with a "pistol lower" kit. PRO2A 9" 300 Blackout 1/7 Pistol Length Melonite M-LOK AR-15 Upper with Flash Can. The AR world is absolutely massive, and you can chamber an AR in everything from .22 LR to .45-70 Government. At a mere 200 yards with a 100 zero, the 300 Blackout drops nearly 5.5 inches more than the 5.56, at 300 yards it drops a whopping 19-inches more. So what I'm gathering from this is, I can use a 5.56 BCG as well as a charging handle in a .300 blackout upper, correct? That straightforward build does, however, help in the weight department with the Pro2A coming in 3 ounces lighter than my other 10.5-inch pistol uppers. Hand-Picked Daily GUN DEALS, and Exclusive Coupons Codes >>>, projectiles weights ranging from 110 grains to 220 grains, https://uploads.tapatalk-cdn.com/20160501/d175a60f384060cfabc4c555b349fd4f.jpg. 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. MSRP: $449. You do not pay Calibre : .300 BLK - Canon (cm) : 20.3 - Catgorie : B - Coloris : Vert - Coups : 10 - Longueur (cm) : 37.44 - Poids (g) : 1120 . Get It. BCM 11.5 (ELW-F) Upper Receiver Group (standard) MCMR 10 MLOK $708.00 Out of Stock. Shorter barrel lengths are excellent for close-quarters engagements making a .300 blackout rifle or pistol a great option for home defense, but youll want to protect your hearing with a suppressor or some other muzzle device. DB10 6.5 CREEDMOOR BLACK GOLD SERIES 20 UPPER ASSEMBLY W/ 15 M-LOK V RAIL W/ ANTI SLIP TEXTURE PADS , BLACK $ 499.95 $ 424.96. 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. Anyone have a top 5 recommended, 300 blackout stripped upper with the focus being lightweight and gas reducing? I have a Radial 8.5" 300blk and it is a nice tight fit on a Areo M4E1 (No need for tension set screw) It shoots straight out to 50yds/ 1.5" group free standing, bench rest 100yds / 3.5" group but I blame the shooter. Sort By: Ghost Firearms Elite 16" Upper .300 Blackout - Black $319.00 $249.00 Choose Options Ghost Vital 7.5" Upper .300 Blackout $299.00 $239.00 Choose Options One thing we might change out were it our gun is the handguard: it has a ton of room to mount anything up to and including the kitchen sink, but the square profile is kind of thick in the hand. Primary Weapons Systems sells a complete upper exclusive on Brownells that is competitively priced compared to the others on this list, but you get a far superior action. Notify me of exclusive sales and special promotions. Javascript is disabled on your browser. Get proficient on YOUR time. Copyright 2023 American Firearms LLC. I haven't had any issues with the 416 stainless barrel. We already have an account registered for email address The .300 Blackout cartridge is available . I slept 11 hours the first night. CHAINSAW COMPLETE UPPERS $ - $ Select options. What are your favorite .300 BLK upper receivers? The Gau Munich-Upper Bavaria (German: Gau Mnchen-Oberbayern) was an administrative division of Nazi Germany in Upper Bavaria from 1933 to 1945. $249.95 $449.95 Add to Cart AR-15 300BLK 16" STAINLESS BLACK CLAW PREMIUM UPPER ASSEMBLY / MLOK AR-15 300BLK 16" STAINLESS BLACK CLAW PREMIUM UPPER ASSEMBLY / MLOK. No votes yet. Copyright 2023 Pew Pew Media, Inc. All rights reserved. Jigs; Accessories & Optics; Handguns. 410 at Aero Precision. They shipped me a 10.5-inch .300 BLK upper, which arrived quickly, and I found the folks at Pro2A Tactical very easy to work with. Choose Options. Of course, the 9mm approach is only a stopgap measure that lacks stopping power at range. If you have ever fired an AR in 5.56mm indoors, whether a range or in some other circumstance, you know that it is, in fact, a seriously bad time for you and anyone north of the barrel in terms of sound, flash, and concussion. 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. I run Remington umc in both 120 and 220. We all have a budget to live and die by, and recognizing that, Id suggest any of the .300 BLK options from Radical firearms. With suppressors and SBRs being all the rage, the .300 BLK continues to grow. Its short and sweet and perfect for a .300 BLK pistol or SBR. I just built a Classic Firearms (Bear Creek Arsenal) .300blk 16" stainless barrel with an Anderson upper. BCM Standard 20 Government Profile Upper Receiver Group $439.00 Out of Stock. I have a PWS piston upper in 300blk. To convert your standard AR into a .300 Blackout rifle, it's as simple as swapping out the upper . Davidson Defense Premium Left Handed M16 AR-15 Black Nitride Finish Bolt . This would be for an 8" barrel. CHAINSAW, UPPERS, AR-15, 5.56, 300BLK. gear. This upper is ideal for tactical and hunting purposes. (Limited Time Offer), Get the latest updates on new products and upcoming sales, Browse by Barrel Length, Barrel Style & more, AR-15 Bolt Carrier Groups and Charging Handles, Flash Hiders, Suppressors, and Compensators, Gas Blocks, Gas Tubes, and Front Sight Bases, BCM Upper Groups with KMR (KeyMod) Handguards, BCM Upper Groups with (M-LOK) MCMR Handguards, BCM Upper Groups with QRF (Quad Rail Forend), Armorers Tools, Cleaning, Lubrication, etc, All Armorers Tools, Cleaning, Lubrication, etc, BCM Standard 9" 300 BLACKOUT Upper Receiver Group w/ MCMR-8 Handguard, BCM MK2 Standard 9" 300 BLACKOUT Upper Receiver Group w/ MCMR-8 Handguard, BCM Standard 7" 300 BLACKOUT Upper Receiver Group w/ MCMR-5 Handguard, BCM MK2 Standard 16" 300 BLACKOUT Upper Receiver Group w/ MCMR-15 Handguard, BCM Standard 16" 300 BLACKOUT Upper Receiver Group w/ MCMR-15 Handguard, BCM MK2 Standard 12.5" 300 BLACKOUT Upper Receiver Group w/ MCMR-10 Handguard, BCM MK2 Standard 9" 300 BLACKOUT Upper Receiver Group w/ KMR-A8 Handguard, BCM Standard 9" 300 BLACKOUT Upper Receiver Group w/ KMR-A8 Handguard, BCM Standard 12.5" 300 BLACKOUT Upper Receiver Group w/ MCMR-10 Handguard, BCM Standard 16" 300 BLACKOUT Upper Receiver Group w/ MCMR-13 Handguard, BCM MK2 Standard 9" 300 BLACKOUT Upper Receiver Group w/ QRF-8 Handguard, BCM Standard 9" 300 BLACKOUT Upper Receiver Group w/ QRF-8 Handguard, BCM MK2 Standard 12.5" 300 BLACKOUT Upper Receiver Group w/ KMR-A10 Handguard, BCM Standard 9" 300 BLACKOUT Upper Receiver Group w/ MCMR-7 Handguard, BCM Standard 16" 300 BLACKOUT Upper Receiver Group w/ KMR-A15 Handguard, BCM Standard 7" 300 BLACKOUT Upper Receiver Group w/ KMR-A5 Handguard, BCM MK2 Standard 16" 300 BLACKOUT Upper Receiver Group w/ KMR-A15 Handguard, BCM Standard 12.5" 300 BLACKOUT Upper Receiver Group w/ KMR-A10 Handguard, BCM Standard 9" 300 BLACKOUT Upper Receiver Group w/ KMR-A7 Handguard, BCM MK2 Standard 16" 300 BLACKOUT Upper Receiver Group w/ QRF-12 Handguard, BCM Standard 16" 300 BLACKOUT Upper Receiver Group w/ KMR-A13 Handguard, BCM MK2 Standard 16" 300 BLACKOUT Upper Receiver Group w/ KMR-A13 Handguard, BCM Standard 16" 300 BLACKOUT Upper Receiver Group w/ QRF-12 Handguard, BCM Standard 12.5" 300 BLACKOUT Upper Receiver Group w/ QRF-10 Handguard. It costs less than equivalent uppers from some major brands. towards your level. Looking for a 300 blackout upper receiver for around $300. Make sure you keep ammo and mags separate. Plus, .300 Blackout-chambered AR-15 still uses the same magazines without a loss of capacity, i.e., a 30-round 5.56 NATO AR mag will still hold 30 rounds of Blackout. I have one of their left handed ARs. Read on to see how to get your standard 5.56 AR-15 ready to use .300 BLK. I wont dive too deep into the 5.56 vs. .300 Blackout debate because we have an article on that. 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. Check. The uppers all feature different-length handguards that accommodate the mounted flash suppressor. Select what level shooter you are! Just make sure and meet ATF's guidelines for AR-15 pistols. Any ole 300blk pistol upper from PSA at that length will work just fine. The same thing can be said for home defense in a .300-chambered AR replacing pistol caliber carbines - lots more stopping power with little fuss. The ammo price continues to drop, and upper receiver options are everywhere. Before resting its case-in-chief, Alex Murdaugh's defense team called Timothy Palmbach to the stand. Maybe for you, but not everyone. .300 AAC Blackout Chamber. LAR-15M Complete Upper Halves .300 AAC Blackout. Check out our gas system guide for more on that front. Open. PSA does it again with sub-$200 uppers that work. The .300 BLK has easily been the most successful new caliber in the last 20 years. Blackout was designed to provide more energy and penetrate barriers better than the 9mm, while being compatible with a standard AR-15 magazine.