I just got a Norinco frame (complete) and I am installing a Colt Sistema slide and barrel (non matching pieces) on it. I put a S&A MSH with lanyard loop-that worked out though the fit was tight. The gun came with a magwell funnel so the MSH was non lanyard looped. The top slid on-seems to function OK. I need to get a recoil spring guide and extractor. What kind of extractor would just drop in? Is there anything to watch for in regards to barrel fit/bushing fit/link fit? I have a Wilson's set of 4 links and a few different bushings-some used and some new. I am also short a MSH pin-the one I used is longer for the magwell funnel. Any tips? Best places for parts? Billricca.com has a few things I need.