300 BLACK OUT UPPER FULL

At this point, I think you would struggle to find anyone saying anything negative about them. If you've read our AR-15 guides, you know we're huge fans of Palmetto State Armory, so it should come as no surprise that they're our budget-friendly choice for the best 300 Blackout upper.ĭespite being one of the most affordable manufacturers out there, PSA is known for their exceptional quality. 1) Palmetto State Armory (PSA) Uppers - Best Budget Option Best 300 Blackout Upper Optionsīelow you'll find our choices for the best 300 Blackout upper for every budget. Again, just be sure to adhere to all applicable laws. This not only saves you money, but you can get a 300 BLK upper shipped straight to your door in most states because the lower receiver is the serialized portion of an AR-15. Thus, most people decide to buy a 300 Blackout upper so that they can quickly slap it onto a complete AR-15 lower they already own. Barrels, however, are arguably the most challenging part to swap out and not something you would want to do every time you want to change calibers The only part that needs to be swapped for a standard 5.56 AR-15 to shoot 300 Blackout is the barrel and gas system. Why Get a 300 Blackout Upper Rather Than a Complete Rifle Just remember to comply with all federal, state, and local laws surrounding barrels under 16'. 300 Blackout ARs shine as home-defense guns and for use in close quarters in general. The slower burning 5.56 runs into significant reliability issues with barrels under 10.3'-11.5' due to too little dwell time.Īll of this is to say, 300 Blackout is a fantastic caliber for AR pistols and short barreled rifles. More important than that, 300 BLK is actually reliable in shorter barrels like 7' and 9' lengths because it is faster burning than 5.56.

300 BLACK OUT UPPER FULL

In other words, 300 Blackout comes closer to its full potential shot out of shorter barrels than 5.56. By comparison, 55gr 5.56 shot out of an 8' barrel only achieves 77.36% of the velocity of the same bullet shot from a 16.5' barrel. The 125gr shot out of a 7.5' barrel had 88.11% of the muzzle velocity as when it was shot out of a 16' barrel. The source for the data in the table is this video by Mrgunsngear, one of my favorite gun related YouTube channels. The table below shows muzzle velocity and energy using a variety of different bullet weights shot from barrels ranging from 7.5' to 16'. Though 300 Blackout does gain some performance benefits from being shot out of longer barrels, these benefits are less pronounced than calibers like 5.56 NATO. Barrel Lengthīefore jumping into the uppers, there are a few things to cover. You can jump ahead to our picks by clicking hereor continue reading. Radian Weapons Model 1 300 BLK - Best Overall.BCM 300 BLK 9' MCMR-8 - Best for the Money.Aero Precision 300 BLK Uppers - Alternative Budget Options.Palmetto State 300 BLK Uppers - Best Budget Options.Here are our picks for the best 300 Blackout Upper at every budget: In this guide, we'll help you find the best 300 Blackout upper for your needs. Because regularly swapping out barrels is a pain, most people to choose to buy a 300 Blackout upper. 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. In recent years, 300 ACC Blackout (BLK) has become one of the most popular calibers for AR platform rifles.

300 black out upper