300 BLK 16″ T-Box Rifle Barrel


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AAC originally designed the 300 Blackout to be the optimum platform for sound suppression and to match the 7.62×39 when using super sonic rounds. We’ve found that there is much less extra propellant burning out of the muzzle following your shot which means less flash signature, less noise, and less damage to your can. The Blackout is one of the best choices for an SBR or an AR Pistol in our opinion.

Always chambered and head-spaced by hand to SAAMI specifications. Our barrels are designed to be sub-MOA tack drivers when using match ammo and quality components.

NOTE: All Blackout barrels come with a pistol length gas system with 1:8 Twist Rates

Matched Bolt:
ALL T-Box barrels come with a T-Box brand Bolt

The T-Box Matched Bolt will provide you with a barrel that is headspaced to a specific bolt for the ultimate in Repeatability potential. This includes custom headspacing and a QPQ (Melonite) treated bolt.



Additional information

Weight 2 lbs
Dimensions 10.5 x 1.2 x 1.2 in




Gas Block Size

.750, .875


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