Designed exclusively to work with TTI base pads. Each coil compresses and stacks into the neighboring coil to provide the highest capacity available in your magazines.
*Also compatible with PPQ +5/6 Magazine Extensions.
With the extended baseplates my slide was NOT locking back with the last round. I tried many things including heavier ammo. Someone suggested to get a stronger follower spring. TT had these and i bought 3. Now my slide locks back with any ammo.
Ordered these to fix my failures to feed with older Canik tp9sfx magazines and they work great.
These springs are the best damn springs money can buy. Idk what the hardness or material is but TTI hit the nail on the head. The out last any other spring I've ever used. Sig, hk, grams, etc. They work extremely well in 140mm mag bodies. I have 2 that I ordered well over a year ago and the still lock the slide back even after 10's of thousands of rounds being loaded into the mag. These springs will also work very well in your factory mags too! I always buy these when they are on sale every year because who doesn't like to save a little money, and I keep my own stock but if I had to pay full price, I won't be disappointed!
