TTI Magazine Spring for STI, SV, & Rescomp Magazine Tubes
11 coil (140MM) magazine spring for the TTI competition follower. Designed exclusively by ISMI to work only with the TTI follower and made with ISMI quality and precision. Each coil compresses and stacks into the neighboring coil to provide the highest capacity available in your magazines.
Use the TTI Mag Spring with the TTI Base Pad and TTI Follower for maximum capacity.
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my review of this product is more or less a review of the proshop. These guys rock. I bought some springs on a holiday weekend saturday, one week before an area match and got the springs on that wednesday with enough time to test the mags before the area match on Friday! BS Proshop is awesome