300 Blackout Upper

Every 300 BLK upper we sell can be configured to your specifications. Customize your 300 Blackout Complete Upper with an optic, muzzle device, rail, bolt carrier group, magazine, or charging handle from our matched selection. Your 300 Blackout AR 15 upper receiver will arrive turn-key and ready to shoot out of the box.

.300 AAC Blackout (7.62x35mm) was developed as an upgrade to the 5.56 NATO, using fast burning powder to eliminate powder flash. 300 Blackout will operate either supersonic for long range application, or subsonic and suppressed for close quarters engagements.

300 Blackout Uppers for Sale