Care should be taken not to use 300 BLK ammunition in a rifle chambered for. Its purpose is to achieve ballistics similar to the 7.62×39mm Soviet cartridge in an AR-15 while using standard AR-15 magazines at their normal capacity.

), also known as 7.62×35mm is a rifle cartridge developed in the United States by Advanced Armament Corporation (AAC) for use in the M4 carbine. 300 AAC Blackout (designated as the 300 BLK by the SAAMI and 300 ACC Blackout by the C.I.P. 300 BLK Scopes & Optics.The 300 AAC Blackout plastic tipped, left, compared to 300 AAC BLACKOUT 125 gr match, 300 AAC BLACKOUT 220 gr subsonic, 5.56×45mm NATO, and 7.62×39mm. 300 BLK upper receivers? Anything that makes them stand out? Need a dedicated optic for the. Knowing the industry, there must be some amazing options on the market I simply haven’t seen.Ĭheck out more calibers and everything AR in the Ultimate AR-15 Resource. These are just my favorites and represent a very small section of the market. I’m one man and couldn’t possibly see each and every upper out there. 300 BLK continues to grow. The ammo price continues to drop, and upper receiver options are everywhere. With suppressors and SBRs being all the rage, the. 300 BLK. I also double and triple-check things before loading a mag into the rifle. Personally, I keep them organized by using different color mags – FDE and black for 5.56 and Olive Drab for. Make sure you keep ammo and mags separate. Used to be.Īs you can see in the image above, bad things can happen when you load the wrong cartridge into your rifle.

This used to be a 5.56 rifle until the owner loaded. 300 BLK upper that we built for a super nice truck gun. 300 BLK), then you can get a folding brace for a super compact AR. That means if you went with an under 16-inch barrel (which you pretty much gotta do with a. Want to go a little different? Enter the BRN series, which is based on the AR-180 series that didn’t have a buffer tube but instead went with a short-stroke piston. The M-LOK rail is fantastic and provides more than enough room for accessory attachment. My personal favorite is the 8.5-inch upper with an MLOK rail. Prices range, but each option is affordable and thoroughly modern. They are mil-spec, and all feature flat top uppers, forwards assists, and threaded barrels. These uppers aren’t the fanciest, but they work. Radical firearms also produce their uppers in a wide variety of configurations. These uppers range from 8.5-inch barrels to 16-inch options. 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.įrom steel-cased Wolf range ammo to brass supersonic and 220gr subsonic rounds.Ĭoupled with a LAW Tactical Folder, it fits nicely into my small trunk safe. The length also gave me enough rail real estate to put on lights.300 BLK AR-15 Pistol, 10.3-Inch Ballistic Advantage 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 time I checked out both a 9-inch barrel and a complete 10.3-inch BLK upper recommended by Clint Hanson. I love Ballistic Advantage 5.56 barrels ( full review) for the right mix of performance and affordability. PSA is also, generally, one of the most budget-friendly options. 300 BLK build you want to create, you can find the upper for it from PSA. 300 BLK in uppers of all sizes, from 7.5-inch barrels all the way to 16-inch barrels, with every standard size in between. One of the many things they cover is the. PSA makes a huge range of items for the AR-15 platform and, for that matter, the AR-10 also. “Every length has a problem it’s solving, but the 10.3 inch is the go-to and most versatile.” Best. So if compactness is the name of the game…make sure you have a suppressor to add some backpressure and also enable you to run a longer handguard. Once you go under 8 inches or so, you can run into cycling issues since the. 300 BLK AR-15s (10.3″ Top and 9″ Suppressed Bottom) 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. We asked Clint Hanson, the founder of Ballistic Advantage, and his go-to barrel length is 10. This question comes up a lot…and the answer varies depending on your end use and if you’re using a suppressor. 300 BLK upper receivers so that you can make your transition to this wonder-round. What I will do is point you to a few of the best. In my opinion, the two rounds are designed for different tasks, and having both simply opens up your options.

Black out 300