.40 S&W Glock pistols have been a top choice for American Law Enforcement for over a decade--thanks in no small part to their ultra-reliable polymer-and-steel factory magazines that run reliably for years and stand up to endless abuse ... These full-sized 10-round magazines are compatible with every double-stack .40 S&W Glock currently manufactured, including the 22, 24, and 35 from Gen 3 on up.