Originally Posted By bjarvis:
I was wondering what size roll pin holders and roll pin punches I would need, for building an AR-15.
1/8" roll pin punch and holder for the rear trigger guard pin.
3/32 roll pin punch and holder for bolt catch. You can buy specialized punches for this from Brownells that are profiled to help avoid scratching the receiver, though these are not needed.
5/32 pin punch for trigger pins.
This is what you need for a lower.
If you need to remove a gas tube, the proper size for that is a 5/64 roll pin punch.