It has been Suggested (by Tamara Keel) that Kalashnikov when he gets to Hell should beat up Marx and Lenin until they cough up the royalties he should have gotten.
Of course in Hell they are communists.
I have read that Texas Ranger Frank Hamer was fond of a Remington model 8 with a 15 round mag. If you look at the rifle and it’s available chamberings, it would be a very simple thing to create a modern assault rifle out of it.
The design is over a hundred years old.