- Improve overall reliability and feeding
- Fits Para-Ordnance, Kimber, BUL MS, Rock Island high cap mags
- Works with .38 Super, .40 S&W, .45 ACP
- Extended +10% spring (thicker wire)
- DOES NOT LOCK THE SLIDE BACK ON THE LAST ROUND
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Bought the spring & follower to replace the worn-out Rock Island spring & upgrade the follower. Small problem is that It does not hold the slide back after last round. The part of the follower that should make contact with the slide stop doesn't touch it.