Now at RSR: The New Generation 4 Glock pistols are now available. GLOCK is introducing its subcompact Model 26 (9MM) and 27 (40 S&W) pistols in the new Gen. 4 version, along with the full–size Model 21 in 45ACP. These product introductions feature the time–tested design and performance of the GLOCK pistol, but with the new multiple backstrap system that allows the user to change the circumference of the grip to fit individual hand size. These new GLOCK handguns are available in the online catalog section of the RSR Group, Inc. Web site.