The Cobalt Kinetics A5-CK Buffer System Kit H3 6.08 oz with Tube and Spring is designed to offer smoother recoil for AR-15 platforms. Developed in collaboration between Cobalt Kinetics and VLTOR, this kit features an anti-tilt buffer design to address unnecessary movement and enhance overall performance. The kit includes an H3 weight buffer (6.08 oz), a compatible A5 buffer tube, and an A5-length spring. Includes Cobalt/VLTOR A5-CK buffer, tube, and spring H3 buffer weight is 6.08 ounces Designed for AR-15 platforms This buffer kit utilizes an anti-tilt feature and is intended for improved recoil control and system reliability for AR-15 rifles. The collaboration between Cobalt Kinetics and VLTOR offers users a well-engineered upgrade for recoil management.