140mm Spring is caliber specific 170mm Spring is univers Complete, high capacity magazines or high quality components to rebuild your damaged magazines so they work just like new.. Fits STI, SVI & McCormick high capacity frames only. 140mm Spring is caliber specif. Complete mags come with Polymer base pad and nylon follower for flawless feeding. 9mm follower includes adapter plate. 9mm follower includes adapter plate.

Carry Mag Pad and 170 Mag Pad (not included with replacement tubes) can be used on both 140mm and 170mm magazines, magazine bodies & components 38 super 170mm 27 rnd magazines tubes and still be legal for USPSA competition. TIG welded heat treated stainless steel bodies hold up to competition use without cracking or failure. Mag pads and caliber specific followers fit magazines, magazine bodies & components 40 cal 170mm 23 rnd magazines STI magazine tubes only. Complete mags come with Polymer base pad and nylon follower for flawless feeding. Fits magazines magazine bodies & components sti high capacity replacement body 40 cal/170mm 23 round STI SVI & McCormick high capacity frames only. Complete high capacity magazines or high quality components to rebuild your damaged magazines so they work just like new. All springs are tempered music wire and fit STI bodies without trimming. Mag pads and caliber specific followers fit STI magazines, magazine bodies & components 170mm universal spring magazine tubes only. Carry Mag Pad and 170 Mag Pad (not included with replacement tubes) can be used on both 140mm and 170mm tubes and still be legal for USPSA competition. TIG welded, heat treated, stainless magazines magazine bodies & components magazine spring 170mm steel bodies hold up to competition use without cracking or failure. All springs are tempered music wire, and fit STI bodies without trimming.