I have an older Glock 22 magazine. Recently it started going nose down on the last round and not feeding it. I replaced the spring and it didn’t help. The mag body is in great shape so I’m thinking a new follower is in order. It has a 5 on it and I’ve read that it must be replaced with another one with a 5 on it, but I’ve also read that it doesn’t matter. Does anyone here have any insight?