At the risk of starting a long thread, I must post this ?/observation.
I have a long "silencer" that I use on a shotgun. This item is two feet in length and uses a series of down facing ports to direct gases into grass to quiet shotgun reports. Hasting sells a 6 foot version for $190...
Now, airguns are sold in Europe that have "moderators" on them, which are supposed to decrease the report of a pellet leaving, say a precharged rifle (pcp) at 1250 fps or so, breaking the sound barrier. They still "crack."
I had a rifle with a long moderator on it, that I sold, it still cracked.
I now have a BSA Lightning, which has a "Volumetric" moderator on it, in .22. It still is noisy...
Now, given the shotgun rig, classified as a choke by ATF but decreases noise, and the strict interpretation of the regulations on suppressors,
I would like to know just what the point is with restrictions on moderators/suppressors applying to air rifles?
Seems quite inconsistent, and way too vague to be of any value when it comes to defining "suppressor" for shotguns and air rifles shooting under sound barrier and even those over, as the crack remains and the practical limits of suppressor length precludes them on airguns of any length, the 15 inch efficient barrel limit notwithstanding.
Will be interested in comments.