Hey guys, I went shooting with a buddy the other who who recently purchased a gun in .40 SW. Me shooting 9mm most of the time decided to give his firearm a shot. The recoil was not nearly as bad as everyone makes it out to be and in my opinion at best I could HARDLY tell a difference between my glock 19's recoil and his glock 23. Anyhow, on to what this topic is really about, I hear glocks in .40 SW have "unsupported casehead" is this for all glocks? old glocks? certain model glocks in .40? And if so, can I see pictures on this? If this have "fixed" this, I really wouldn't mind getting a g23 to use as CC for when I'm bird hunting this fall, since wild hogs are a big pain in Texas and have been known to really do some damage to people here. Hope to hear any feedback soon, Thanks!