I've been using this Transitional .54 riflegun for about 25 years now. Last night sitting in the mist-snow four does walked by (bucks only this year) I put the rifle on them just in case one sprouted antlers and noticed mt brass front sight appeared to be missing, I wiped the ice off the barrel but still not much luck. That evening by the time I walked back to the cabin and peeled off wet gear I noticed the sight was back again. I've come to the conclusion that thin strips of brass shrink in inclimate weather. Or I need glasses.