SA was not shipping 9mm's when I got the itch. Then a 1991A1 Colt turned up. Better sights, trigger job, and a mag well funnel make it easier to shoot but it functioned well from the start. A very pleasant gun to shoot and very effective in ESP. Shooting Star 10-shot .38 Super magazines work in mine; otherwise all 1911 9mm mags are 9-round. I declare at 9 round capacity and just use a SS to load 9+1 without having to handle a Barney Bullet mag or top up. I very seldom feel short on ammo that way. You could use all SS .38 10 shot to run at 10+1 but that last round is hard to load and it takes a real push to seat a mag with 10 under the closed slide... as in a Tac Load.