CMMG AR-15 H2 Buffer Assembly has one steel and two tungsten weights for increased mass compared to the H buffer. Heavier buffers can reduce felt recoil and improve ejection consistency. It is recommended when tuning a rifle to step up buffer weights incrementally, as too heavy of a buffer can affect function. H2 Buffer weight: 4.6 oz. All CMMG products come with our Lifetime Quality Guarantee.