clandestine
AR-15 Savant
If you are going to have a completed 80% lower anodized do you need to ream the safety/selector and trigger/hammer pin holes slightly oversize to account for the thickness of the hard coat anodizing? The 80% lower drill bit set I used contains a 5/32" trigger/hammer pin drill bit and a 3/8" safety/selector hole drill bit. On a 7075 lower the bare aluminum holes these bits make are very snug; I'd hate to have to ream an anodized hole out (to the bare aluminum) to get std. pins to fit. Any advice?
Couldn't say without having the lower in front of me. The spec for the safety bore is .375 and the FCG bores are .155.
I would ask the anodizers how thick the anodizing is and make corrections. The safety bore does not fail till it reaches .380 and the hammer and trigger bores don't fail till .163.
L