I have some brass punches, but the small ones don't work very well on pins that have never been removed, they just bend, they work fine for reinstalling the pins tho. I just use steel pin punches to knock them out, I used a small stone in the dremel to make them cup points so they self center on the round headed pins. Brownell's sells a small one for the front trigger guard pin, it's listed for use on a handgun.
Tim