Black Leaf Industries Black Line pistol calibre carbine barrels are sourced from and made in he United States of America, these barrels are made with 4150 Chrome Moly Steel and come finished in a Black Nitrate/Melonite finish.  All are threaded to 1/2 x 36 thread, come cut with integrated feed ramp and spun in 1:10 Twist

Barrels shoot great and are the perfect add to any build, will fit all BL9, and most AR9 style Glock and Colt mag accepting rifles.