I have both the factory Surefire carrier (hard plastic with steel spring retaining finger) and the vertical Blackhawk. Both are okay, but I tend to wear narrower belts than they're designed for, so both shift and move a bit for me. I'm probably being picky, but I'm not real fond of the RR-I-I-PP of velcro, nor the "sproing" of the metal clip, and I'm tossing around the Mad Dog Gun Glove 6P/6Z kydex holder, and I also like the look of Scott Evan's, if it can be had without the mag holder. Decisions, decisions.