I got a set for my Buckmark and really like them...BUT....... On my first outing with them, the rear sight just disappeared! No way I could find it, but after some time they did send out a new rear sight. Then yesterday was the first day out since and the front sight disappeared. Luckily I found it and slid it back into place. Anyone know what I can put on the front sight to keep that from happening again without messing it up? Super glue maybe?