This is a sniper with gear for frozen conditions. The gun is a custom Arctic Warfare Magnum. The stock isn't quite right and it's a bit big, but overall pretty satisfactory.
About this creation
Based off of an SMLE with a TLC walkie-talkie antenna for the scope and a trimmed down lever part from a piece #73737 for the barrel. The stock has a slightly expanded 1/16 in. hole drilled through it.
A cool shot of aiming a scope at a minifigure. Of course, you can't really see through the scope, but this photo was still fun to make. You might have to back up from the screen a bit to see it clearly.