Ar15 muzzle cover

This cover is to prevent obstructions from entering the barrel, and if made correctly, is even waterproof.

Simply print it to scale, and it should be just a little bit too snug to slide over the end of the muzzle brake. Heat it with a lighter down the sides, and slide it on. When it cools it will shrink around the muzzle. Then just leave it on until you use it. When it's time to use it and you don't even have the time to take it off, simply fire the weapon, and it will be obliterated.

This muzzle cover only works with the original A2 birdcage flash hider, and others that are the same outside dimension.