Re: Essex Arms Corp.
Armscor makes the frames and slides for the STI Spartan only. The Spartan is then fitted with STI internals. STI makes their own frames, slides and parts for their line if 1911's.
Essex has come a long way since their beginning. No more mismatches holes,etc. I've built several 1911's using their early frames and only had to send one back. That doesn't seem to happen anymore.