Welcome to Glock Talk Why should YOU join our Glock forum? Converse with other Glock Enthusiasts; Learn about the latest hunting products; Becoming a member is FREE. At the 2010 SHOT Show, Glock presented the fourth generation , now dubbed Gen4 by Glock itself. Updates centered on ergonomics and the recoil spring assembly. OK, I just saw the Gen 4 Glock 19 on Gallery of Guns and wanted to know how it stacked up. I have three all three Glocks, 22,23,& 26 in.40 S&W and I noticed some. A contributory factor… Glock Six-Part Upgrade FAQ Behind the April 1992 Technical Bulletin issued by Glock, Inc. In the matter of Glock's infamous Upgrade (let. ***BPD: G-22 GEN 2.0: 0000-00-00: Bossier City PD 3 Pin Gen 2: 00**** G-17 GEN 2.0: 0000-00-00: 0009MIA: G-23 GEN 0.0: 0000-00-00: City of Miami police stamped: 0022US gen 123 adapters fit standard & compact glock frames gen 1, gen 2, and gen 3 series models. Glock Serial (Barrel) Number Lookup, date code, when manufactured, made, produced, when was glock 42 fixed serial numbers, glock 42 recall serial numbers, glock 42 serial numbers, glock generation by serial number, glock generations by serial number AAHL212: G-23C GEN 3.0: 2016-08-12: Usa being Georgia stamp on slide and barrel : AAHL212: G-23C GEN 3.0: 2016-08-12: Built in Georgia usa ga state stamped on slide. gen 123 adapters fit standard & compact glock frames gen 1, gen 2, and gen 3 series models: 17, 19, 22, 23, 24, 31, 32, 34, 35, 37, 38 only available in black the.