The HIPERFIRE XAK mainspring is a tri-twist music wire hammer spring for AK-pattern rifles. It delivers a 2+ lb pull weight and a hard, positive reset with HIPERFIRE XAK triggers, and it works with other stock and aftermarket AK fire controls. Pull weight and feel can vary from rifle to rifle, since AK receivers have no single standard.
- Part: Mainspring (hammer spring)
- Construction: Tri-twist braided music wire
- Fits: AKM-variant rifles
- Compatible with: HIPERFIRE XAK triggers and other AK fire controls
- Feature: Hard, positive reset
- Manufacturer part #: XAKMS
