Planetoid of the Monkey People

In my convalesence on the Death Sofa (like a Death Bed, but not so dire) I caught a movie or two. One was the 1968 classic, World of Sentient Simians. And there is a gun or two in the movie that caught my eye. (and I probably shouldn't refer to them as Monkeys, less I incur the wrath of a particular librarian. or even another librarian.)

They are prop guns, naturally. But even before I did some cursory internet information searches I could tell that the rifle was at least based on the M1 Carbine. I could see the bolt and slide, and the well for a magazine is only big enough for Carbine size rounds.

Rifles used in closeups were functioning, had a nice wooden, black, 'after-market' stock. They were painted black and it made them look like they were made out of metal. Rifles that weren't used or in closeups were much cruder looking, relfecting a less refined "Ape" industrial base, perhaps? But you can still see the roots of the M1 there. For such 'primitives' they sure picked a sound design.

Here is the 'functioning' rifle stock, without the Carbine parts, like the barrel and receiver, etc.

Keep yer hands offa my rifle, you damn dirty ape!

I mean, excuse me. Who am I to judge what 2 consenting hominids do in the privacy of their own Motel Room? Carry on. Love is beautiful.