Thingiverse

Airsoft selector cap by GabrielCrowe
by Thingiverse
Last crawled date: 4 years, 1 month ago
This is a cap for the hole in the lower AR receiver opposite to the selector. I have made a lot of variations, but this one seems to have the best fit. If it is not as tight as you need or too tight, it is easiest to either sand it or scale it in your slicer.