I posted this question in the build it yourself forum but no replies. I have a SAR 1 and removed the front sight and gas block so I can have a bayonet lug and threaded muzzle. I bought a Romanian gas block with bayonet lug from K-Var and I need to know what size drill bit I need to drill the two holes for the pins. I'm guessing a 1/16 (1.59mm) bit and use a drill press???