The other thread is of an Airsoft version of the MGC Sterling copy used in ROTJ. The site says this is a copy of the Sterling L2A1. The one that was used to make ANH and ESB blasters was the L2A3. I have a cut-up L2A3 that I've been casting bit by bit to make a few ANH E-11s.
Looking at the pics on Evike's site, it's really close to the L2A3, with only a few minor differences I've spotted so far; the bevel on the butt cap is a bit too wide, the curvature of the folding stock is too sharp, and the shape of the grip are slightly different from the one I have.