Junk Maruzen Ingram M11 MAC11 Old Model Operation Unconfirmed

This is an older Maruzen MAC11.
It's likely a BV type or from that era.
I don't have the environment to test its functionality, so I cannot confirm if it works.
The exterior also shows signs of use. Therefore, I am listing it as a non-working junk item.

The selector lever, safety, trigger, and stock are movable, and the magazine can be detached and attached. The upper bolt appears to be fixed and does not move.

How about using it for display or cosplay?

Manufacturer: Maruzen
Materials: Resin + Plastic, partial metal
Magazine: Clear resin
ASGK 3708029