I bought the Blade-Tech for comp and added in thumb screws so I can loosen while on the line and tighten when not. I added in the BOSS hanger; biggy difference to the good.
I'm shooting USPSA Production with an M&P and the SFx in carry optics for steel. Gives me the time to get used to the optic before I move to carry optics in USPSA.
Carry Optics is a whole other level of fun.