use a non lubricated condom (you may have to unwind it to the serial numbers. what? you've never unrolled one that far before)
or cut the fingers off a rubber glove or surgical glove and use them like a condom.....
i think i'll try tuck tape i think duck tape will leave a residue on the barrel, warming the gun defeats the purpose of leaving it outside so it don't freeze
Crappy Tire sells electrical tape that is rated for low temps....Pretty much all I use.
Regular electrical tape works just as well as long as you tape up when the metal is warm.




























