Not that I keep in mind but it is similar to some other AR upper. Practically nothing to disassemble besides pulling the BCG and charging manage out. The PAK-9 is a far more strange chook, best described as a sheet metal AKM 9mm semi-vehicle pistol. Just like the 1911, this https://charlesdaly410ar19528.diowebhost.com/72164104/everything-about-charles-daly-410-ar-upper