300 Blackout Upper by KM Tactical
300 AAC Blackout upper for an AR-15 by KM Tactical The .300 AAC Blackout (300 BLK) upper for an AR-15 is a component designed to allow the rifle to fire .300 AAC Blackout cartridges, offering a versatile option for shooters looking for a balance between power and suppressibility. This upper assembly typically includes several key parts: Barrel : The .300 Blackout barrels are commonly found in lengths ranging from 7.5 inches for compact, close-quarters setups to 16 inches for more standard applications. The barrels are designed to optimize the performance of both subsonic and supersonic .300 Blackout rounds. The twist rate is often 1:7 or 1:8 inches, ideal for stabilizing a wide range of bullet weights. Gas System : The gas system of a .300 Blackout upper can vary in length (pistol, carbine, or mid-length) depending on the barrel length and the intended use of the firearm. The system is tuned to ensure reliable cycling with both subsonic and supersonic ammunition, especially when...