My fave Glock caliber? .40S&W. I own a G23 ( my EDC ) and a G35. I also own a G20 10mm, and a 40-9mm conversion barrel and a .22LR kit for my G23. In the past I have owned a G21 ( Confiscated by LEO after being used for SD and never returned.), a G21SF ( sold to fund kit car build ), G21 ( destroyed in house fire ) and a G19 ( I gave it to my kid for HD ).