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A Grams Engineering 11-coil magazine spring lying diagonally on white, the small black S2 follower clipped to its top end.

Grams Engineering

STI/SV/SPS 140mm Magazine 11-Coil Spring & Follower Kit

$18.90

The spring and follower that go inside a 140mm 2011 tube: Grams' S2 follower and an 11-coil spring, no slide lock.

Grams' FKS-11 follower kit: one "Grams Format" S2 follower and one 11-coil spring, for STI, SV, SPS or CR magazines that measure up to 145mm long with the basepad on. Grams lists it for the first- and second-generation STI tubes and every caliber the 140mm 2011 tube comes in, 9mm, .38 Super, .38 Super Comp and TJ, .40 S&W and .45 ACP, with no spacer in the magazine; the one exception is the older first-generation STI 9mm tube, which needs its spacer. The follower has no slide-lock function, which is the point on a match gun: the slide stays down on empty and a reload is a reload. Retailers put the gain over a factory spring and follower at a round or two in a 140. Ben Stoeger's shop carries it under the name above.

Where to buy it ↗

Options

Includes

Grams Format S2 follower · 11-coil spring

Fits

STI (1st & 2nd gen) · SV · SPS · CR · tubes up to 145mm with basepad

Calibers

9mm · .38 Super · .38 Super Comp / TJ · .40 S&W · .45 ACP

Slide lock

None

Shops add and retire options — see everything pictured, and check what's currently available, on the product page.

Links go straight to the maker or a shop that carries the item, and prices are theirs — they change, so treat anything quoted here as a guide. Nothing is paid placement.