Paintball silencers are sort of silly...There are many paintball guns on the market that are more than 1/2 as quiet as some of the others on the market...and for those that are loud...there are several (non silencer) alternatives that will quiet the gun more than any suppressed firearm.
Ways to quiet a paintball gun.
1. Ported barrel...a barrel with ports along some or most of its length will allow the gas buildup to dissapate before the paintball leaved the end of the barrel...Barrels without porting produce a loud POP when the paintball leaves the barrel.
2. Venturi bolt...A venturi style bolt will split the gas column into several equal columns, these column eventually merge back into a single laminar flow...However, the initial disturbance equalizes all pressures along the insides of the barrel, equalling less turbulence, and also providing a quiter shot, along with increased accuracy, and gentleness to brittle paint.
3. Low pressure system...Converting a paintball gun to low pressure is tricky. High pressure systems use a small volume of gas in a short burst to propel the paintball up to speed...This is the most gas efficient method, however it is also the hardest on the paintball, and also the loudest. A low pressure system will deliver a larger volume of gas, in a longer burst, accelerating the paintball up to speed more slowly, reducing turbulence in front of the ball, increasing accuracy, and making the marker significantly more quiet.
Now there are several manufacturers that pruduce paintball guns with all of these features standard...And they are VERY quiet...When firing paint, all you can hear is the cycling of the bolt. My shocker, that was pictured in the start of this thread, is one of the quietest paintball guns on the market...
Players who normally flinch back into cover with the sound of a shot get nailed by me all day long....They never hear the shot.
But for those of you that want a suppressed paintball gun, purchase a ported barrel such as this:
And fasten a larger tube around the ports, sealed at both ends, and stuffed with polyfill. Will work well to quiet LOUD guns, and trust me, the BATF wont knock down your door in the middle of the night. This is not a rule that is enforced.