KIRK High Rigidity Lens Foot LP-67 Used The items for sale are only those pictured. This high-rigidity lens foot is designed specifically for the SONY FE 400mm F2.8 GM OSS (SEL400F28GM) and SONY FE 600mm F4 GM OSS (SEL600F40GM) lenses, replacing the original foot and secured with four screws. Compatible with the MAGPUL QD system. To prevent product switching, returns and claims are not accepted.