All US Made Krinkov 4 Piece flash hiders are made of 4130 steel and the cone is nickel plated inside and out. The main body and cap are phosphated black.
Will work with all calibers up to and including 7.62. Overall length with cap installed 3.25″
Threaded for 26mm Yugo (M85/M92).
The main body is engraved USA and counts as one part towards 922(r) compliance.