The ZEROED 30K, just like the standard ZEROED 30 except, smaller. The "K" size 30 cal suppressor shaves an inch of length and a couple ounces of weight while still being robustly overbuilt with a combat load full auto rating for centerfire rifle and pistol calibers. The 30K is machined from through-hardened 17-4 stainless steel and given a nitride finish that protects against corrosion, erosion, and is safe for ultrasonic cleaning.