Thread: How to immobilise old fiream to create safe wall hanging

Gunsmith to create a new action, that is not actually an action? i.e. solid slug the barrel gets threaded onto, and the bolt gets cut and welded to?
Would look correct but would be treated like a childs toy gun / airsoft / paintball gun, as far as requiring to comply under the Firearms legislation
The original action with it's associated serial number could be sold off, kept, or destroyed.