One Horse AR-15 300 BLK 7.5" Complete Upper Receiver

This One Horse complete upper receiver is a compact 300 Blackout build for AR-15 pistol projects. The 7.5" barrel is set up to stabilize both subsonic and supersonic 300 Blackout loads, so the same upper can run heavy, quiet bullets behind a suppressor or lighter supersonic ammo at the range.

A 7" M-LOK handguard keeps weight down and leaves room for a light, a grip or other accessories. The bolt carrier group has a nitride finish for smooth cycling, added durability and easy cleanup, and a charging handle is included, so the upper goes together with a lower without hunting for parts. Short, light and suppressor friendly, it suits close quarters work and compact builds.