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:

1. 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.
2. 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 a suppressor is used.
3. Handguard: Handguards can vary in length, material (aluminum, carbon fiber, etc.), and design (free-floating or non-free-floating). Free-floating handguards are popular for their ability to improve accuracy by not contacting the barrel.
4. Muzzle Device: The muzzle device (such as a flash hider, muzzle brake, or suppressor mount) is chosen based on the shooter's needs. Some shooters opt for devices that facilitate the attachment of suppressors, given the .300 Blackout round's popularity in suppressed shooting.
5. Bolt Carrier Group (BCG): The BCG is a critical component of the upper receiver, designed to work with the .300 Blackout cartridge. It cycles the action of the rifle by extracting spent casings and chambering new rounds.
6. Upper Receiver: The upper receiver houses the barrel, handguard, and BCG. It is made from materials like forged aluminum for durability. The upper receiver also includes the ejection port, forward assist, and the Picatinny rail or other mounting systems for optics and accessories.
7. Charging Handle: This allows the shooter to manually cycle the action of the rifle. It can be a standard design or an enhanced version for easier manipulation, especially when using optics.
8. Optics and Sights: While not always included with an upper assembly, some may come with sights or scopes. The choice depends on the shooter's preference for close-quarters combat, medium-range engagement, or a balance between the two.

A .300 Blackout upper offers AR-15 owners a highly versatile platform capable of engaging targets effectively at various distances, with the added benefit of being suppressor-friendly. This makes it a favored choice for hunters, target shooters, and tactical users seeking a large-caliber performance in a compact, AR-15 format.

Check out our 300 Uppers at KM Tactical or shop our many products at kmtactical.net