I have an older style G21 mag with a +2 extension on it. I'd like to pick up a new 11 Coil spring for it so it'd have a bit more "umph" when locking the slide open on empty. All the 11 Coil springs seem to be the new style so I'd need a new style follower as well and wonder if it would work on the old style mag body or not? I figure if I have to buy too many mag parts(spring, follower, maybe a new base plate and insert to get rid of the +2) that I'd have about as much into it as it'd cost to just get a new G21 mag. Also, I could probably just get rid of the +2 and go with a new base plate and insert and solve the "problem" as well. Anyway, just wanted to see what new style mag parts were compatible with the older style mag bodies. Thanks.