as stated in the title i have a G21sf with that ambi mag release. I haven't had a single problem with it in the 2 years i have had it. it hasn't released when i didnt' tell it to nor has it fallen out of the mag well like i have read about. I'm impartial to it really. I have never used the release from the right side so i really don't need it. It was a gift so i'm not going to complain by any means. The one minute issue i have with it isn't an issue with it yet. I carry it on a daily basis in an IWB holster. I have noticed that the release is putting a pretty good imprint on the leather that sits between the gun and my side. It has yet to actuate the release and dump the mag while carrying it, but is somewhat of a concern if it were to happen. I guess what i'm getting at is does anyone know if i can replace it with a non-ambi mag release? Any help would be greatly appreciated. Thanks, Q.