AR15 TO M16/M4 FA DRILLING JIG

thingiverse

Please verify your local laws before attempting to drill into your Lower. This is a full auto sear drilling jig designed for converting an AR 15 to accept the M4/M16 sear. Clamp the jig in place, ensuring that the top guide of the jig fits flush with the lower's top and the round peg is inserted into the safety hole. Drill both sides of the Lower using a 2.5mm drill bit, then ream the hole with a 3mm drill bit for final dimensions. I'm always open to suggestions and help on improving the design and proof of concept. Don't forget to check out my other cool designs and follow my weekly dose of KooKoo uploads.