This is a very high quality Krytac inner barrel. It fits the Kriss Vector and the PDW perfectly, at 155mm in length. Includes one fit O-Ring. In the back, it is NOT a disfigurement, the change of color is due to the bucking having been covering it tightly. Minimal use. Full metal. I believe is 6.03. $25 plus shipping. Shipping is $10 to 48 cont US.