This Custom SSI Spring Coupler is for the SSI Magazine Springs.
-available as a separate item to help fuel the R&D projects across the country.
-the SSI spring is starting to look like the GO TO spring for all box fed competitions shotguns.
Tested Magazines and shotguns
AK: Vepr 12, KL, KS, Saiga, Elite, SMG and Surefire Mags
AR: VR60, VR60plus, VR80, VRBP100, VRPA40, Typhoon