I bought some C products stainless steel/teflon coated magazines with anti-tilt followers. These magazines look great, nice black finish, and sound great. However, they are junk. Bought 10, tried out 4. 3 didn't feed last round and one ejected last round prematurely. This was repeated several times. Ended up selling all 10 and purchasing more P-mags. I've had no problems out of P-mags and Brownell's TAC.