Ultra Light Kit: Special die steel, in-the-white. Hammer: Rc 50-53. .39 oz. (11.1 g) weight. Sear: .07 oz. (1.9 g) weight. Ultra Light Speed II: Tool steel, in-the-white. Hammer & Sear: Rc 50-55. .7 oz. (20g) total weight. Sear: .07 oz. (1.9 g) weight. Super Match Kit: Special die steel, in-the-white. Hammer: Rc 50-53. .47 oz. (13.4 g) weight. Sear: .07 oz. (1.9 g) weight. Tactical II Kit: Special tool steel, in-the-white, Hammer. Rc 50-53. .5 oz. (14 g) weight. Sear: .09 oz. (2.5 g) weight. Tactical Match Kit: Special tool steel, in-the-white. Hammer: Rc 50-53. .52 oz. (14.7 g) weight. Sear: .09 oz, (2.5 g) weight. Warp Speed Kit: Special die steel, in-the-white. Hammer: Rc 50-53. .35 oz. (9.9 g) weight. Sear: .07 oz. (2 g) weight. Disconnector: .069 oz. (1.9 g). Duty/Carry 4½ lb. Kit: Billet alloy steel, heat treated to Rc 50-54, in-the-white. Hammer, black. Kit includes spur hammer, sear, disconnector, 23 lb. hammer spring, and sear spring. Professional 5 lb. Kit: Billet alloy steel, in-the-white. Hammer, Rc 50-54, .5 oz. (14.1 g) weight. Sear 2 oz. (5.6 g) weight. Disconnector .2 oz. (5.6 g) weight. 23 lb. hammer spring, tactical sear spring included.