I don't remember where I got this but it's the one I use every day because of the pocket for a spare mag.
Right in your back pocket and you are good to go all day.
Anyone tried the 9 round extension? I like the idea of it.
I have the +1 baseplate and I had a spring with the kit. I'm not sure if the longer spring is needed or the shorter one. with the long spring I can't get that extra round in there...?