answers: July 2010
context: models) have a bright red frame and Simunition-adapted practice pistols ("T" models) – a bright blue frame for easy identification. In 2009, the Glock 22 RTF2 (Rough Textured Frame 2) (chambered in .40 S&W) was introduced. This pistol featured a new checkering texture around the grip and new scalloped (fish gill-shaped) serrations at the rear of the sides of the slide. Many of the existing models became available in the RTF2 version, including the 31, 32, 23, 21, 19. Some of those did not have the fish gills. At the 2010 SHOT Show, Glock presented the "fourth generation", now dubbed </s> 1982, the cost-cutting Model 29-3 dropped recessed cylinders and pinned barrels for crush-fit barrels. The -4 and -5, produced from 1988 and 1990 respectively had changes to improve durability for heavy use. In 1994 the 29-6 began production, now fitted as standard with rubber Monogrips from Hogue to replace the previous wooden items, standard tapped holes also being provided for attaching scope mounts. The 29-7 started production in 1998 with changes to the locking mechanism, the firing pin's attachment, and a hammer and trigger produced with a metal injection molding process. Introduced in 1978, the Smith & Wesson Model 629 </s> grip space. The introduction of fourth-generation Glock pistols continued in July 2010 when the Glock 19 and Glock 23, the reduced size "compact" versions of the Glock 17 and Glock 22, became available for retail. In late 2010, Glock continued the introduction of fourth-generation models with the Glock 26 and Glock 27 "subcompact" variants. In January 2013, more fourth-generation Glock pistols were introduced commercially during the annual SHOT Show, including the Glock 20 Generation 4 along with other fourth-generation Glock models. In September 2011, Glock announced a recoil spring exchange program in which the manufacturer voluntarily offers to exchange the
question: when was the glock 19 gen 4 released