This Custom SSI Spring is for box fed shotguns.
-Replacement spring for the 15 and 20 round AK mags.
-Replacement for the 19 round AR VR Metal mags.
-fits all AK and AR style followers and magazines.
-using tried and true ASTM A228-18 Music Wire
Tested Magazines and shotguns
AK: Vepr 12, KL, KS, Saiga, Elite, SMG and Surefire Mags
AR: VR60, VR60plus, VR80, VRBP100, VRPA40, Typhoon