I reciently put a + 1 extention on my carry mag. Thing worked as advertised, smooth instal, no changes in operations. Unfortunetly I found that the slight extension was just enough extra length that the +1 adaptor kept getting caught in my pants pocket and fouling my draw. For the record, I'm 5/'11 , 210 lbs and wear 36-38 in waist pants w/ slash pockets - think dockers or business casual pants. Despite all types of attempted techniques i just could not get a smooth draw and it was diminsing my confidence that I would be able to deploy my lil friend in the event of a "life chaning event." AT lunch I went home and put the mag back to factory config. Please don't take this as a complaint about the extention- it works as advertised and depending on your build, daily clothing and method of carry your milage may vary. I am planning on picking up a 2nd mag this weekend and will put the +1 on it for a range mag. I also just put an armalaser on my lil friend- WOW I love it, can't be easier to use and also works as advertised.