.750 outside barrel dim., .223/5.56 Gas Block Regular Profile, Slant Top, Top and Bottom Picatinny Rails
Black oxide finish, solid precision machined construction. The AR 223 Regular Profile Gas Block for barrels .750 has milspec picatinny rails on top and bottom allowing you to mount accessories such as a front sight or a laser underneath. It sits flush on your quadrail without any gaps. No modification to your barrel is required.
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