Wolff Gunsprings AR-15 Extra Power Hammer Spring 3-Pack

A three pack of Wolff extra power hammer springs for AR-15 fire control groups. A stronger hammer spring hits the firing pin harder, which Wolff says cures common ignition trouble with hard primer ammunition such as military surplus.

These are for semi auto trigger groups only, not full auto or burst. Expect a slightly heavier trigger pull than a standard spring. Three springs cover a couple of builds or leave spares in the parts bin.