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 .875 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* More Information Condition New in Box Finish Per Color Black Manufacturer Aero Precision Manufacturer Part Number APRH100366C Model Gas Block Type Gas Tubes – Gas Blocks UPC 815421025521
