by B.B. Pelletier
The REAL question is “What makes an airgun noisy?” because quiet is just the absence of noise. People who shoot airguns like them to be quiet. With the race for power, they often stumble back into the noisy realm, again. This is not a post about silencers, but about passive ways to quiet an airgun.
Air is the culprit!
High-pressure air is the real noise culprit. And, CO2 under pressure acts the same as air, so you might as well toss it into the same pot. Spring-piston guns are the quietest because they use the smallest amount of high-pressure air. By the time the pellet gets to the muzzle, the air in a springer is under a lot less pressure than the muzzle blast from a PCP or other pneumatic.