Odin Works Odin Arca Rail M-lok To Arca Bipod Rail Black. It was designed with the arc locking system meaning that it will work with standard arc type bipods and anything that mounts using the ARC attachment system. It has an anti-rotational locking system and is made out of 6061-T6 aluminum. It has an anti-snag design and a single spring return to zero feature to make it easier to attach and remove. Specifications for Odin Works Odin Arca Rail M-lok To Arca Bipod Rail Black: Manufacturer: ODIN Works Color: Black Finish: Hard Anodized Fabric/Material: 6061-T6 Aluminum Package Contents: Odin Works Odin Arca Rail M-lok To Arca Bipod Rail Black