15-22 16" HV, standard vel & CCI quiet, rem subsonic cycled the gun without can but require hearing protection.
15-22 16" Tested with 4 different 22 lr cans all cycled the gun no hearing protection needed
15-22 10" with 6" integral suppressor ( Innovative Arms)- Fed HV 36gr bulk, cycled the action and no hearing protection indoors or outside.
So a 16" is quieter with quiet/subs without can, 16" with SV or subs with can is more quiet ( no real difference in sound between the SV and subs) and the quietest ( movie quiet ) IA integral with hv. I tried some (5 rd) of SV and it did not cycle. The IA is only a suppressor, not an SBR, so you do not need ATF permission to travel to a legal state. The only thing you hear with the IA is the action. I have been looking at ways to quiet the action. Check out there video, all you here is clicking. Be Safe,