Awsome! So it is an adapter for the 'Sub Caliber Gun Machine'. That is a new one for me.
Now the question is, how should the OP restore this rifle? If mine I would have a dilemma. Clean it up and preserve as is and baffle other collectors whenever I pulled it out for show and tell? Or remove the thingy-ma-jig and put it back into a standard shooting rifle?
Can the rifle still be shot with a live round with that device still attached? It looks like the rifle is permanently altered to accept the assembly?
Now the question is, how should the OP restore this rifle? If mine I would have a dilemma. Clean it up and preserve as is and baffle other collectors whenever I pulled it out for show and tell? Or remove the thingy-ma-jig and put it back into a standard shooting rifle?
Can the rifle still be shot with a live round with that device still attached? It looks like the rifle is permanently altered to accept the assembly?