Aero Precision Gas Block Low Profile Phosphate .625

Gas Block Features These gas blocks along with Aero gas tubes create an efficient and reliable gas system for your AR15 or AR 308 rifle build. Gas Block Specifications Fits barrels with .625 Outer Diameter Constructed from 4140 hardened steel Aero A Logo block Phosphate coating Low profile for easy fitment Set Screws are Steel 10-32 x 3/16 Knurled Cup Point *Roll pin not included*