16" Machine Gun Steel ( 4150 ) Cold hammer Forged Hbar Barrel, Chrome Lined, 1x7 twist, stripped barrel.
Moly Vanadium per DIN21CrMoV511 (machine gun steel) Chrome per 184.108.40.206 of
MIL-STD-171 and QQ-C-320, Class 2 (conventional hard or flake chrome) Phosphate
per 220.127.116.11 of MIL-STD-171 HP & MP tested 1/2 x 28 tpi thread.
Please note, this barrel meets all Mil-Spec standards and does not have the M-4 cutout thus making the barrel without the thick to thin back to thick shoulder dynamics making it a better more accurate barrel.