I wouldn't call a Mni-14 a lemon. They shoot EVERY time. The Mini isn't as accurate out of the box as an AR. My Mini, from 25 years ago, shot 8 inch patterns at 100yds with iron sights. It NEVER failed to fire or cycle properly. I would have preferred to stick with the Mini as I prefer more conventional looking guns.
My requirements for a coyote rifle are: an accurate, .223/5.56 cal, semi-auto, detachable magazine, conventional looking rifle. The Mini did not meet all of my requirements. It wasn't accurate enough. The AR doesn't meet them either. I'm not wild about it's aesthetics. But it's looks are growing on me. I opted for the AR as function, in this case; accuracy, was more important to me than form.
Best of Luck in making your decision.