Wolff Ar-15/M16 Extra-Power Hammer Spring
Wolff Ar-15/M16 Extra-Power Hammer Spring, Durable, steel springs provide extra hammer power to ensure proper ignition with each trigger pull. Replaces factory spring. Note: For use in semi-auto models only. Not for use in full auto or burst fire models. Mfg: Wolff SPECS: Steel. Approximately 23/32" (18.2mm) wide, 2" (5.1cm) long.