The Advantage Arms MOD Series Conversion Kit transforms your Glock 17/22 Gen 4 from 9mm/.40 S&W to .22LR making range time more affordable while maintaining your pistol's familiar feel and operation.Advantage Arms Conversion Kit for Glock 17/22 Gen 4Two 15-round .22LR magazines included5-inch threaded barrel for suppressor compatibilityOptics ready with recessed cut for red dot sightsIncludes range bag for convenient storage and transportPerfect for training muscle memory development and recreational shootingThis conversion kit is an excellent tool for cost-effective training sessions and enjoying suppressed shooting with your .22LR suppressor. Red dot optic sold separately.