I picked up 2 poly spikers, a reg pre ban 56s, for my kids as the world will be a wasteland in their lifetime if not mine. Whether mak90’s, nhm91, 56s’s. I too have ran thousands of rounds without issue. Which I have 2 nhm91 I am converting to put the bipod under the lower hand guard as the shots string as the barrel heats up is the only issue I have had with a Norinco.