I gotta say, that is a shit ton of guns to have in a game this simple. And it seems that you have put a lot of care into them feeling different, I think I noticed even some damage drop off at a distance. If I had to give you some advice it would be to focus on one gun! make it feel the best you can, some people probably never got to like a 5th gun. btw, the garand had the best feel imo.
Yeah but it was pretty enjoyable to run around and shoot stuff. Focus on polishing a single gun and maybe some simple environment to run around and you have a pretty neat game.