While you could spend more to get a lighter or slightly more accurate upper, PSA's options get the job done in terms of reliability. Why Should You Upgrade Your Upper Receiver? font-weight: 700; Your upper receiver is literally half of the firearm and includes the barrel. Cons In Stock (0) Select Options. /* latin */ If you are looking for a solid complete .300 AAC upper receiver that is built out of the highest quality components, you’ll want to check out the MK109 Pro. 300 BLK (2) $429.99 (Save 26%) $319.99 src: url(/fonts.gstatic.com/s/opensans/v18/mem8YaGs126MiZpBA-UFW50bbck.woff2) format('woff2'); font-family: 'Open Sans'; It Should Come With A Dust Cover and Forward Assist Davidson Defense "Elizabeth" AR-15 Pistol Upper Receiver 10" .300 Blackout 4150 CMV QPQ Nitride 1-7T Barrel 9" M-Lok Handguard (Assembled or Unassembled) $724.99 $419.99 Sale. Overall, the PSA .300 Blackout 16” Upper Receiver is a solid choice if you want a carbine-length upper. If you're looking for the overall best 300 Blackout upper, the Radian Weapons Model 1 in 300 BLK is your best bet. Our .300 Blk pistol kits are built to get a little more juice behind your shots. Tips During the Ammo and Firearm Shortage Caused by COVID-19 (Coronavirus), Best 9mm Pistols in 2020 (For Concealed Carry, Home-Defense, and More), Best Complete AR-15 for the Money [2020 Review]. View as Grid View List View. Comes with a long stroke system Buyer pays S/I. font-weight: 400; Not only do you have to think about the quality of the product, but also whether it fits your budget. Moving up, BCM's 9" 300 BLK upper is a great mid-priced option that will handle anything you put it through. unicode-range: U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116; } Best .300 Blackout Uppers 1. The end of the barrel also comes equipped with 5/8-24 threads, which means that it can easily accept most muzzle brakes and suppressors. font-family: 'Open Sans'; They're great choices if you want to dip your toes into 300 Blackout or if you're on a budget. The bolt carrier group has a fully automatic profile for better corrosion resistance and is built out of 158 Carpenter steel. As noted previously, neither a dust cover nor forwards assist are truly necessary for an AR-15 to work, but they can also greatly enhanced reliability in rough conditions. Overall, the PSA .300 Blackout 16” Upper Receiver is a solid choice if you want a carbine-length upper. It comes with an Enhanced full-auto rated bolt carrier group and Radian's Raptor-SD charging handle that is optimized for use with suppressors. Built out of forged aluminum and designed to optimize the .300 Blackout round, this upper comes with almost everything you need to build your own .300 AAC pistol-length AR-15. Available Handguard Lengths on the 300 blackout upper include: 10" - 12" - 15". Slide Parts; Frame Parts; AR-15 User Manual; Become A Dealer; FFL License; How To Buy Firearms? If you want to build your own complete .300 AAC AR-15, you should give the PSA 10.5” .300 Blackout Complete Upper Receiver Kit a close look. Finding the perfect pistol is not an easy task. } Below you'll find our choices for the best 300 Blackout upper for every budget. If not opting for 300 BLK specific magazine, we'd say go with the standard … 300 BLACKOUT PISTON UPPERS. An upper receiver is arguably the part of the gun that impacts accuracy the most, specifically if it comes with a free floating hand guard. The Primary Weapons MK109 Pro is a complete upper receiver that comes ready to install with a .300 Blackout lower right out of the box. This kit will complete your rifle for you, and all you will need to acquire is a stripped lower receiver that is compatible with a .300 Blackout upper. 300 Blackout Rifle Kit. This makes it much more affordable to alternate between calibers versus purchasing an entirely new rifle or carbine. src: url(/fonts.gstatic.com/s/opensans/v18/mem5YaGs126MiZpBA-UN7rgOXuhpOqc.woff2) format('woff2'); The best .300 Blackout Rifles needs to have a great balance between being lightweight and accurate. With a 7075-T6 aluminum construction for the receiver itself and a 41450V chrome vanadium barrel, this upper comes ready to use and install right out of the box and is sure to provide a lifetime of service. Aside from the performance advantages this cartridge offers, the biggest reason for its success is that you basically just need to swap the barrel of your standard 5.56 chambered AR-15 to have a 300 BLK rifle. 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