Originally Posted by Styrak
That's just a short 28 round Hicapa mag (as opposed to full size 31 round Hicapa mags)
If it's a TM Hicapa clone, it will fit a 1911 Serpa with a tiny modification to the holster.
Clone on the inside, not on the out. It's got a huge fracking outter barrel. Also, the frame is longer, and scalloped.