Hiperfire XAK AK Braided Mainspring

The XAK Mainspring is a tri-twist, music wire hammer spring for AKM variant rifles. Paired with Hiperfire's XAK series triggers it gives a 2+ pound pull weight and a hard, positive reset.

It also works with stock and other aftermarket AK fire controls. Hiperfire notes that pull weight and feel can vary from receiver to receiver and trigger to trigger, since AK platforms have no single mil-spec standard.