Speaker cabinet carpet comes to mind.
Gun cabinet carpet.
I m going to toss out something else to consider as you build this inside a wall.
The style of gun cabinet you choose will usually depend on the size you need.
Available in red really a wine or maroon green brown black and gray.
All weather commercial indoor outdoor non woven carpet.
The durability of this shotgun cabinet hardware will give you the peace of mind you need.
Then attach the included loop fabric shelf liner with a staple gun or upholstery tacks.
This is great for keeping your safe dry to.
100 high uv olefin fiber.
Use polymat to carpet a shelf or speakerbox line a gun safe as a place mat for pet s eating area create a trade show or classroom display cover windows to line drawers and cabinets make decorations baskets diys and much more.
It is easy to cut fit and mold to your desired shape.
Other gun owners go in for tool chest drawer liners coupled with a 3m mounting tape for lining their gun cabinets.
This organizer kit for your safe is incredibly easy to install in any gun security cabinet or safe.
And make sure there is no real chance of someone drilling screwing or nailing anything from the other room into your cabinets and potentially into a gun.
Even the best gun safe is only as good as its material.
Polymat is a multi purpose non woven felt which comes in a roll.
Excellent for bases of gun stands gun cabinets safes sportsmans work table pads and other small surfaces needing a durable but soft padding.
Keep in mind what is on the other side of the wall.
A carpet runner can be another great option if you want your guns and other valuables to stay dry.
Floor safes tend to be larger to accommodate long gun barrels or multiple firearms.