Compatible with most types of pistols such as the 9mm Luger. 357 Sig, 10mm. 40. 45ACP, and. 380ACP caliber, and 1911 magazines, as well as all single and double-stack magazines. Finally a fun, and easy way to load your magazines, the Raptor is designed for use on virtually all types of pistols, single and double stack magazines, 9mm Luger. 357 Sig, 10mm. 40 and. 45ACP caliber, as well as 1911 handguns.