Brownells Hammer/Sear Block Kit for Colt AR-15 .172 Pin

Machined steel block allows you to mate the hammer and sear (or trigger) outside of the firearm for a clear, unobstructed view of the critical point of engagement.

Accepts a wide selection of hammer and sear pins sized for various handguns and rifles. Dovetailed adjustment block rides in a slotted channel so pin spacing can be precisely set to match individual frames and receivers. Allen screw locks the pin setting so the hammer and sear can be dropped in place relative to their actual position in the firearm.

Great for cutting the engagement surfaces on new parts or fine-tuning factory ones. Pins are individually numbered for proper identification.

Kit includes a plastic storage box and hammer/sear pin block plus all nine sets of special pins for popular models: Browning Hi-Power, Colt Army, Ruger 10/22, AR-15 large and small pin, 1911, Uberti Cattleman, Ruger New SA, and Ruger MKII.

Specs: Block - steel, blued. Pins - stainless steel. 2 1/2" (6.4 cm) long, 11/16" (1.7 cm) wide.