Wolff Gunsprings AR-15 Extra Power Hammer Spring

A single Wolff extra power hammer spring for AR-15 fire control groups. The stronger spring drives the hammer into the firing pin with more force, which Wolff says cures common ignition problems with hard primer ammunition.

For semi auto trigger groups only, not full auto or burst. Trigger pull will run a little heavier than with a standard spring. It is a simple swap during any lower build or trigger job.