Barrel Length 16"
5.56 Nato Chamber
1 in 7" twist
.750" Gas Block Diameter
Does not include BCG or Charging Handle
**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.