Harris Bipods S-LM-LOK SL MLOK Made Of Steel/Aluminum With Black Anodized Finish, 9-13" Vertical Adjustment, Rubber Feet, M-LOK Rail Attachment Harris bipods Clamp To Picatinny Rail Rifles, And Have a Sling Attachment Provision. Spring Loaded Folding legs Are quickly Adjustable For Height. Manufactured With Heat Treated Steel And Hard alloys, bipods Have a Black anodized Finish. Type Of Feet: Rubber Material: Steel/Aluminum Vertical Adjustment: 9-13" Weight: 15 Oz Attachment Type: M-LOK No. Of Legs: 2