Air
Home to the world's quietest airgun moderators, plus precision pellet caddies, self-healing targets, chassis parts, and shooting accessories, all designed and manufactured by Silent Thunder Ordnance. From the Accipiter and Sarissa lines to the Pocket Benchrest and Eyeshine Targets, this is the full catalog of STO air products built for performance and tested before they ship.
Shroud Damper
Shroud Damper
Shrouded air rifles produce more sound than just the uncorking peak of the pellet leaving the barrel. Pressure waves continue running up and down the inside of the shroud long after, exiting as residual report. The Shroud Damper disrupts and attenuates those waves, improving overall sound attenuation with or without a moderator. It also addresses shroud ping, a phenomenon sometimes mistaken for air-tube ping, on rifles where the shroud resonates with each shot.
Key Features:
Broad compatibility: Available in pre-sized variants for popular shrouded air rifles; custom ID/OD sizing available on request
Two-component system: Rubber disc seats at the rearmost point of the shroud, followed by three foam donuts along the barrel
Pressure wave attenuation: Disrupts standing waves inside the shroud to reduce residual post-shot sound
Shroud ping elimination: Damping material prevents shroud resonance often mistaken for air-tube ping
Easy installation: Rings slip over the barrel end or can be slit for lateral installation; rubber disc and foam donuts stack in sequence with shroud reinstalled over the top
Works with or without a moderator: Complementary to existing moderation, not dependent on it
Learn more about shroud damper application and optimization
An undervalued upgrade that sometimes makes a small difference and sometimes makes a significant one. If your rifle has a shroud, it will benefit.
No Damper
Damper
At left are two traces showing an otherwise factory-stock FX Crown .30 caliber with its shroud extended both before and after the addition of a shroud damper. Clearly, the damper is reducing the post-peak sound signature. The difference between the two tests was clearly audible.
Installation Notes:
FX Crown - model listed is for the original (non-superlite) barrel type. Improved performance is achieved by moving the shroud stop all the way to the rear, thereby increasing effective shroud volume with no increase in overall rifle length.
American Air Arms - shroud retainer is threaded to the barrel end. Remove the moderator, and use a pin-tool, round nose pliers, or strap wrench to remove the shroud retainer. If the action nut is vented, insert a small plastic ring or equivalent between the barrel and action nut to block off said vents (they increase the rifle’s sound signature) and give the shroud damper a flat broad surface on which to sit.
