i usuallty have the oposite problem... after pounding the rivets in with a hammer against the flat part on a vise everything looks kinda flat.... :goof:
thats akm rear trunnion rivets btw.
if you're talking about the ones that need support from inside the reciever on the flap, use bolt cutter tool with one jaw flat, not cupped on both jaws like for the front trunnion... but i'm sure there's much nicer methods...