GlobalPioneer GP Larger Polymer Adapter Beavertail with Locking Pins , for gk 17 19 22 23 24 31 32 34 35 37 38 Glock Stealth Black Large Grip Back Strap Polymer Adapter with Locking Pins Adapter Fit Standard and Compact Glock Models: 17, 19, 22, 23, 24, 31, 32, 34, 35, 37, 38 Permitting the Shooter's Hand to Conform to the Frame in a More Secure Manner. Offers More Control and Allows the Shooter to Index on Target More Efficiently. Size: Large. Locking Pin Included. Color: Black.