AR-15 300 AAC Blackout Uppers | Premium Quality Uppers | Moriarti Armaments

AR-15 300 Blackout Uppers

Enhance the performance of your rifle with the 300 Blackout Upper series from Moriarti Armaments. Shop 300 Blackout upper assemblies in multiple barrel lengths, including 5", 7.5", 10.5", 14.5", and 16" configurations, with options for compact pistols, suppressed platforms, hunting, and full-size AR-15 builds. Regardless of your preferred configuration, whether you fancy pistol or carbine length, our 300 BLK uppers offer unparalleled precision and reliability. 

Why choose a .300 Blackout upper?

A .300 Blackout upper offers exceptional versatility for AR-15 owners who want superior performance from short-barreled rifles and pistols while maintaining compatibility with a standard AR-15 lower receiver. Whether you're building a compact home-defense firearm, a suppressor-ready setup, or a hunting rifle, .300 Blackout delivers excellent stopping power with both subsonic and supersonic ammunition. Moriarti Armaments offers complete .300 Blackout uppers in multiple barrel lengths and configurations to suit every shooter.