Barrel Length 16"
5.56 Nato Chamber
1 in 7" twist
.750" Gas Block Diameter
M-16 Profile Bolt Carrier
Carpenter 158 Bolt
Mil-Spec Charging Handle included
Upper may or may not have T-marks
PTAC products are ready for duty, and are meant to be used. As such the finish may have some cosmetic irregularities which include, but are not limited to, scuffs, scratches, and dings or dents in the forgings that do not affect function.