Current Glock's: 1st generation to 4th. Some recoil spring problems with the new generation 4 Glock's. Several spring "upgrades" available.
IWB (miltsparks, cb, mtac, etc) are very popular. A lot of people use pancake style holsters from several custom leather makers.
Pocket guns are in. (J-frames, Ruger LCP, KelTec, etc)
"Tactical" and "Operator" is a common word in the firearms world.
Will add more later.
"I dont believe in an eye for an eye..I believe in two eyes for an eye" Bas Rutten