1911 grips
custom rail covers
tool head holders is a good one
side saddle plates for various shotguns
flashlight holders barrel clamp things
you could actually build lowers
butt plates
glock backer plates
+2 glock extensions
cheek pieces
scope caps
hand guards
holders for stuff inside magpul grips
flashlight bodies buy switches and bulbs
i'd like to do my own line of fire pistons if you're interested but that's more of a lathe/screw machine process?