FRIST thing make sure the fabric can beath the gun must get air or it can rusted. Rust and gun together are not a good thing. I have found that fannel work bested. not knowing the size of the gun If you make a tube about 5 ft. 8 ins wide about any gun will fit in it. I put a handle about 2/3 of the way to the top and put strip over one side of the bag about 6 to 8 ins from that top this way they can fold the top down to the size of the gun and tuck the fold in to the size of the gun.