Bipod Adapters Adapters are often necessary to attach a bipod to your favorite carbine or rifle. GG&G manufactures four Bipod Adapter Rails for light and heavy caliber applications. Precision machined from 6061 T6 billet aluminum and Type III hard anodized matte black to meet mil-spec, all are built to meet the high standards of serious professional end users. The miscellaneous mounting hardware and pins if required for specific applications, are manufactured from steel and coated as needed.