Well, i put this together the best i could but i was thinking this might work. Here's a diagram of what it would look like, 2 screws holding each coveron, and having detents. Of coarse, it would only work with a center feed breech. But, the covers would have to be rounded around the inside, to fit around the breech.
Well, my first year playing paintball i loved the sport, but was scared to get shot. Now, i will share some good drills to help you new comers overcome this. These drills will make you think inside your head - ''This guys insane, he don't know what he's talking about'' - Well, if you think that don't bother. When your not scared to get hit, you will become 2x more of a better player.
First Drill: Start at opposite ends of the field(make sure one of you is going left and ones going right), count down from 10 and start runnning towards the 50 shooting at eachother - In which you will pass eachother. Yes, you will get shot many times. But, after you do this once you will say to yourself it's not too bad. Now, repeat this 1-3 time's. Depending how much you get shot/pain. This will help you with running & gunning ( brake shooting).
Second Drill: Set up 2 cans maybe 15 feet from eathother. Then practice snap shooting at eachother. Once you get hit 5 times you then call yourself out. This will help you with snap shooting, and accuracy.
Third Drill: Start at 100 feet from eachother, then take 5 shots at one another. Once you have completed this, move up 20 feet. Now take another 5 shots at one another, Keep doing this untill your within 20 feet within 10 feet of eachother. While performing this, try to dodge the paintballs. This will become very usefull through out your paintball career. Do this 2-5 times.