Fixture will correctly locate fire control group holes on a receiver blank with a positioning block that fits inside of the trigger cavity.
Made from 1018 steel and case hardened for a lifetime of use.
Fixtures have built in clearance for trigger hump embossments and center support rivet heads. Pistol grip reinforcements plates as well as trigger guards can be fully installed without interfering with use.
Holes will need to be drilled undersized and once the blank is removed from the fixture they are to be reamed to size.