Area 419 Picatinny Adapter for Arcalock Clamps Black. This is helpful with Atlas BT10 2-Screw models as well as Evo etc bipods. Specifications for Area 419 Picatinny Adapter for Arcalock Clamps: Manufacturer: Area 419 Color: Black Fabric/Material: Aluminum Gun Rail: Picatinny Hand: Ambidextrous Gun Type: Rifle Gun Make: Universal Gun Model: Universal Length: 2 in Width: 0.5 in Height: 0.5 in Weight: 0.2 lb Condition: New Country of Origin: USA Package Contents: Area 419 Picatinny Adapter for Arcalock Clamps Area 419 419-ALK-PIC-ARCADT: Picatinny Adapter for Arcalock Clamps Black