I’ve been doing a bit of research about building a semi automatic closed bolt sten. From what I have found, as long as it fires from a closed bolt and is semi auto it should be no problem. There is even an FRT for home made MK2 stens. While looking for receivers I stumbled across a company in the States that produces semi auto closed bolt tubes for Mk3 stens. Anyone out there have any idea if these would be legal/importable?
https://www.indianapolisordnance.com/sten_mk3.html
https://www.indianapolisordnance.com/sten_mk3.html