Hammer Spring For Burst Trigger Pack
The HK German factory intermediate poundage “satin” gray hammer spring is found in all 9mm, 40/10, and .556/223 burst trigger packs and has proven to be the most reliable and longest-lasting spring for burst trigger packs and trigger packs in general.
Works in ALL burst packs and any Navy or SEF style trigger packs in the following calibers:
Please note: In some cases, the burst hammer spring can be used in .308 trigger packs but may promote light firing pin strikes with hard primers.
- Origin: German
- Brand: Heckler & Koch