I decided to try to install a G2 FCG and a gas block with bayonet lug . I got the pins out of the gas block and one pin out of the FSB, got pissed off after about an hour of trying to bang the other pin out and cut the FSB off with a dremel. Almost had the new gas block installed till I figured out I have to drill out the pin holes. What size drill bit do you use? Also where can I get a new FSB for a Romy SAR 1? I checked K-Var and they don't have any.