My go-to FFL, Best Buy Surplus, has always had a steady supply of law-enforcement trade-in GLOCKs. Suffice it to say, they’re fans of the genre. Last month they received a shipment of more than 300 of these pistols — mostly G22s (.40 S&W), but also a lot of G21s (.45ACP) as well — and asked me if I wanted to pick one at random and check it out. What can one expect from a used, duty-weapon GLOCK? Let’s find out . . .