Ok gang sorry if this seems dumb,but just from read some posts i am now at a loss. my standard Glock 27 plush mags are 9 rounders right? Meaning only 9 40S&W fit in them. I could have sworn i read someone put 10 in them and for the life of i cant. I do have both sheere and Pearce pinky extentions that add 1 extraround and the glock original that adds two, but on the mags that the gun came with i can only fit 9 rounds for the record this is right, right?