BCM Blem Upper Receiver BA 13.9" 5.56 NATO Mid-Length 1/7 Twist Barrel with BKF 13" MLOK Rail

Caliber – 5.56 NATO

Barrel Length – 13.9″

Barrel Material – 4150 Chrome Moly Vanadium

Finish – Nitride

Profile – DRP

Gas System Length – Mid-length 

Gas Block Journal – .750″

Twist Rate – 1:7 inches

Muzzle – 1/2x28 Threaded

All NFA/ATF Rules Apply

Important Note:

These items are not factory built BCM uppers.  They are meticulously assembled by our in-house armorer using the most reliable parts we can find and use ourselves.

We do not accept returns on used, blemished (purchased as blem), or custom engraved/laser etched items. 

All NFA/ATF rules apply. You may use this barrel with a lower receiver that is a Registered SBR, Machine Gun, or Pistol. Possession of this barrel along with a Non-NFA lower receiver is prohibited, except when permanently attaching a muzzle device extending the length to 16 inches.