Atlas Bipods M-LOK Adapter Black. It requires two (2) M-LOK standard sized slots for mounting. Specifications for Atlas Bipods BT70 M-LOK Adapter: Manufacturer: Atlas Bipods Color: Black Length: 4.309 in Weight: 5.22 oz Condition: New Finish: Type III Hard Coat Anodized Fabric/Material: 6061-T6 Aluminum Country of Origin: USA Package Contents: Atlas Bipods Bipods BT70 M-LOK Adapter Two 3/8 Fasteners Two M-LOK Nuts. Atlas Bipods BT70: Bipods BT70 M-LOK Adapter Black