First off, I have a G19 that I plan on using for concealed carry. I guess I have short thumbs as I used to have trouble manipulating the slide stop or magazine release for Glocks (and some other brands too). I ended up getting an extended slide stop and extended magazine release earlier this year. After shooting a bunch of ammo through it, I absolutely love the extended slide stop and I honestly don't think it'll get in the way of concealed carry. I'm a bit worried about the extended magazine release. It allows me to drop the empty magazine without having to readjust my right (main?) hand, but if you try to set the G19 down with a loaded magazine on the left side (side the ext. magazine release sticks out) it has a high chance of ejecting the magazine. That's a definitely no no for concealed carry as it may get bumped while in a holster. I thought about simply sanding it down some and rounding out the edges so it wasn't such a sharp square. Any ideas?