Fits NitroFire Pursuit XT Buckstalker XT & Outfitter G3 models. - Our Deluxe Hammer Extension makes it easy to cock your hammer when using a scope. Ambidextrous and knurled for a no-slip grip. Easily threads into hammer. Tighten the screw with a 3mm Allen wrench. You can also use non-permanent Loctite for a more secure hold.