Timney Triggers Impact, Trigger, Black IMPACT SG The Timney Triggers Impact AR-Style Shotgun Trigger is designed specifically for AR-style" semi-automatic" magazine fed shotguns. Engineered for excellence each trigger is hand assembled and tested by Timney Triggers technicians. An anodized aluminum housing contains the internal components. The hammer is machined from tool steel" heat treated" and given a nickel-plated finish for smooth performance. The trigger shoe and disconnector are also machined from tool steel" heat treated and then given a smooth black finish. With a crisp" clean" factory set 3-4 lbs. break" the Impact trigger takes your AR-Style shotgun to the next level of performance.