AK-BAK-BUILDER Receiver Blank Drilling Fixture This tool is designed to be used with 80% receivers with OR without rails and center supports installed. The bottom of the fixture is also setup to be used if your receiver has trigger humps. The fixture is machined and heat treated to last through the drilling of several blanks. Tool has a black oxide coating and the holes are laser marked with the proper drill bit sizes. Drills Hammer Pin, Trigger Pin, Selector Lever, Center Support & Trigger Guard Holes Drill Bits Included: 5/32", 7/32", 5mm, 7mm, 10mm The stop pin for the rear of the trigger opening is the key to getting it aligned in the fixture. After that it's just as simple as putting in the receiver support and setting the fixture on the aluminum plate on your drill press.
I’ve used this and the included drill bits on four of the AOA Polish 80% and one Childers 80% blank. The only bit that’s worn is the 5/32. The fixture is still great and will work for another 5 blanks easy. If you use a drill press even a cheaper 5 speed one like I use the fixture will last for a long time. Use tap oil and the bits will work for several blanks too. It also has a separate roll pin location for aligning Polish blanks.
Very well made, easy to use, and value priced , what's not to like !