by $23.90 This package contains (3) mag springs, 13 coils long, designed to fit a ”Grams Format” follower. They are a replacement spring for any of the Grams ”Follower Kits”. SKU: GMSS-13-3 Category: Mag Springs Related products GMSS-13 $8.90 GMSS-11-5 $37.90 GMSS-11-3 $23.90 GMSS-13-5 $37.90