Thanks pat. I have made pistols and rifles before. I have also milled frames from blocks of aluminium and they have all work great, and I have put more rounds then I can count through them. So I know I can do it that way. It just takes so long and they're so many machineing operations that I was looking for an easier and for this particular pistol more unique way to do it.
Your right, I don't know anything about working with polymers, thats why I am trying to get a little info( my area is metal, if someone want's to know the best steel for a knife used in a specific application, what S90V is, or the differnce between damasteel and damascus then no prob). If I wanted to start a small company suppling speciality frames then injection moulding would definitely be the way to go. But I already own one company (no it has nothing to do with fierarms) and that keeps me busy enough. So in your last post I guess you're saying that Liquid Resin Casting won't work for a part like this?