The Advantage Arms MOD Series Conversion Kit transforms your Glock 19/23 Gen 1-3 pistol to fire .22LR ammunition making range training more affordable while maintaining your pistol's familiar feel and operation. This California-compliant kit includes everything needed for conversion.Advantage Arms MOD Series Conversion Kit for Glock 19/23 Gen 1-3Converts 9mm/.40 S&W pistols to fire .22LR ammunitionIncludes two 10-round magazines and 4.02" barrelOptics ready with recessed cut for red dot sights30-second installation with no gunsmith requiredLast round bolt hold open featureIncludes range bag for convenient transport1-year factory direct warrantyCalifornia Legal compliancePerfect for cost-effective training improving muscle memory and enjoying suppressed shooting with your .22LR suppressor. Maintains the exact grip angle and trigger pull of your Glock while dramatically reducing ammunition costs.