The Beast Must Die
 

After watching this fantastic horror movie from the 70s. I got to thinking on WHAT automatic rifle the man was using from the helicopter to shoot the werewolf. It LOOKS like a B.A.R., but the magazine is not wide enough for 30.06.

It may be a prop, it might not. Any input is appreciated. This is what happens on bad movie night, you get hung up on a small detail in a no where picture! :)

Scene? In YT somebody uploaded the complete movie.