The GEMTECH 1/2-28 and 5/8-24 shim kit is ideal for mounting flash hiders, muzzle breaks or suppressor mounts.
Crush washers and split-ring washers can cause canting of any brand of suppressor.
By replacing those crush washers with a precision-made set of GEMTECH shim washers you can achieve perfect alignment and timing.
GEMTECH 1/2-28 shim kit is designed for most 5.56 rifles such as AR15-type carbines.
GEMTECH 5/8-24 shim kit is designed for most 7.62 rifles such as AR10-type carbines.