The SERIES II STONING FIXTURE provides a precise method for achieving a clean trigger pull on semi-automatic firearms, specifically designed for the AR-15.
It features adjustable adapters for customizing hammer angle and requires separate purchase of Series II India Stone or Series II Hard Arkansas Stone for operation.
The fixture comes with a .173" diameter pin adapter for Colt Commercial AR-15, a hammer and sear clamp, three Allen wrenches, and instructions for use.