WOLFF EXTRA POWER AR HAMMER SPRING

Hammer springs available in factory strength and extra power. XP hammer springs improve common ignition problems when using hard primer ammunition.  Note: For use in semi-auto models only.  Not for use in full auto or burst fire models.

Faxon Factory Note- This hammer spring is recommended for the 7.62x39 kit. The increased energy is required for reliable detonation on some surplus ammunition. Those who ordered the caliber with their rifle will receive their rifle with this spring installed. It is not included with the ARAK-21 upper receiver only.