The HK Army Vice Tank Grip is the premiere tank grip on the paintball market. They are specifically designed to provide you a comfortable. anti-slip. surface area on the rear of your tank. The Vice Tank Grip is comprised of a dual. color-injected. malleable. rubber material that effortlesslywraps around the butt of your carbon fiber tank. Select your favorite HK Army Vice Tank Grip to keep your gun light-weight and reduce tank-slip. orunnecessarytankmovement in game play. Available in 10 color options. One size fits alltanks. Recommended tank sizes: 48ci.50ci. 62ci. 68ci. 70ci. 88ci. 90ci and 100ci