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Check out our catalog of Glock 21SF holsters by BlackHawk. We sell the entire BlackHawk holster inventory, so if there's a specific Glock holster by BlackHawk that best suits your needs, we are certain to have it. Should there be a holster by BlackHawk or any other Glock 21SF holster you are interested in and cannot find, let us know and one of our product support experts will assist you. No matter if you need a BlackHawk holster for a Glock 21SF or any other firearm, OpticsPlanet.com is always the best destination!