The slide release lever on my Glock 21 is real tough to use. I almost always just grab the slide and pull it back to charge it after a mag change, last week I cut my left had bad and that's hard to do. It's always been like that from the time I bought it just never gave it much thought. It's bone stock by the way, got it brand new, and has about 700 rounds through it Any way to take care of this?