Happend to be on the Glock website tonight, saw that they'd updated the 10mm page to include the Gen4 G20 and G29: http://us.glock.com/products/model/g20gen4 http://us.glock.com/products/model/g29gen4 Curious: I noticed that the following measurements are different between the Gen3 G20/G20SF and Gen4 G20 (did not check out the G29 as not interested in that): Length: 209mm, 204mm, 193mm (Gen3, Gen3SF, Gen4) Width: In mm, same. In inches, Gen4 is .01 inches wider. Barrel Height: 32mm, 32mm, 20mm (Gen3, Gen3SF, Gen4). I wonder if 20mm is a typo and should be 30mm, or if that is for real? I know almost nothing about firearm design, but, that seems like a significant unpublished change. Barrel Length: In mm, same. In inches, Gen4 is .01 inches longer. Given the width change above, I wonder if this is an errata on the Gen4, or, was errata on the Gen3s and they corrected on the Gen4. Unloaded Weight: 785g, 780g, 780g (Gen3, Gen3SF, Gen4). That's it...just thought some was interesting. Chuck Wanna kill these ads? We can help!