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2 backstraps see***What's in the Box Glock 19 (Gen5) Pistol (3) Magazines *****(2) Interchangeable Back Straps Speed Loader Pistol Cleaning Set Back Strap Disassembly Tool (MBS) Cable Lock Hard Shell Case Owners Instruction Manual

3 back straps come with it the one that's on it already and 2 others to ensure a good fit to your liking