Urban choke

[garryc]

I've seen these 32" barrel extensions that screw into the choke threads. Can anyone tell me what the heck they are for?

[Dave McC]

Metro extension. For low noise when used with sub sonic ammo. Meant for removing nuisance critters without bothering or alarming nearby civilians.

L P Brezny, noted firearms techie, helped on the R&D.

[garryc]

how quiet is it with a trap load?

[Dave McC]

Pretty quiet, but still obviously a gunshot. It's not a silencer nor a suppressor.