CMMG Buffer Assembly H2 Black. Heavier buffers can be used to reduce felt recoil and improve erratic case ejection. It is recommended when tuning a rifle to step up buffer weights incrementally as too heavy of a buffer can affect function. Specifications for CMMG Buffer Assembly H2: Manufacturer: CMMG Color: Black Weight: 4.6 oz Condition: New Package Contents: CMMG Buffer Assembly H2 CMMG 55CA92C: Buffer Assembly H2 Black