Big box from 1/2 inch plywood, acoustic foam, smaller box inside with rubber mulch and 1/4 inch chicken wire mesh might be the ticket to ultimate quietness! 
I’ll even paint the outside with HOA approved fence color for the ultimate suburban stealth target box!
I’ll even paint the outside with HOA approved fence color for the ultimate suburban stealth target box! Upvote 0
) , that must definitely makes airguning stealth!! .I also painted mine in camo ,and I shoot only .22 cal ; who can do the most can do the least...