I’ve got some TTI +5 on the 17rd mags but can only get 20 reloadable in them with stock followers so I’m hoping the Grams kit will get to 23.

However, without changing followers and still adding capacity reliably, are there others that are as good that maybe are easier on and off? Spoiled by the CZ Custom base pads as they have an L shaped plate that lets you compress the spring and slide the pad on and off easier. I don’t see that for the Sigs.

Factory 21 round magazines. They work perfectly.

I have lots of 17rd mags already so I’d like to use those.