Fun, reliable, not too accurate. I know several people who keep them in boats.
You can modify M4 mags to fit with a dremel tool.
It’s based on the M-14 M1-garand. The mechanism is kind of clunky and noisy.
I uses it for zombies. An AK-47 knockoff is the nearest competition.
How can you use M4 mags in a mini 14. Please tell me where to go and I will buy you a case of PBR.