I don't know a lot about the Polytech but I have read a lot of stuff on the Norinco version, mostly fair. Lots of headspace issues but some are good and shoot well. Luck of the draw basically, some suck others are great. I did read a review that mentioned the Polytech as being much better than teh Norinco but I'd still be leary of a Chinese M-14, personal opinon take it for what it's worth.