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no they do not only the colt mags work with the colt ace 22lr conversion "Colt/Walther - do not interchange with GSG,1911 22 conversion kits or the Colt Ace

Brian, it should work just fine. The Umarex Mag 22LR 10Rd (517-604) should be compatible with Umarex/ Colt 1911.

James he's asking if it compatible with the old "Real" Colt 1911 and it is not