Use some cling-wrap(or whatever they're calling that stuff now ) over the muzzle. It will blow off with the expanding gases. Also electrical tape works; even if muzzle water isn't your problem it's just a good idea, especially when walking. Now for the breech: your gun should be fairly waterproof, but just in case put your hand over the action when sitting, and when moving put more plastic wrap over the action and put a couple pieces of tape on the end of it(I don't like to use plain tape on the breech...pet peeve? orwill it bedifficult to wash any stickiness off...lol)