Gen 3 PMAG dust/impact cover. Got pissed that they stopped selling gen3 mags with this and make you buy separately so I made them. If you don't use the 3mf file thats fine, just use the print settings below

45 degree tilt long ways

8-10 walls

100% infill

use PLA+, not sure if PLA will work or not but for impacts, probably not.