Another Norinco .223, works well haven't had any real problems. One jam, where a reloaded case seperated in the chamber. As noted, replace the firing pin spring-use a light oil/grease on the pin. Otherwise will (mine did once) slam fire. Once the spring replaced, that takes care of that problem. The magazines, some are a bit of a too tight fight, some minor sanding/grinding makes them easier to lock in quickly. Accuracy not bad for a short barrel and a AK-47 system, and for over 5,000 rds the reliability is quite good. Essentially the advantage of the NATO round combined with the Kalash operating system.