STX Full Size, Emperor Scorpion Full Size, TACOPS Full Size, Spartan II Full Size, Equinox
Please select the FULL-SIZE SI Magwell. The SI Magwell will work very well on the above models with little to no fitting or blending.
Emperor Scorpion Fastback
Unfortunately, Scorpion Fastback frames are often out-of-spec and we cannot guarantee the SI Magwell will install without fitting or blending.