Allen Co Rail Mount Rifle Bipod - 9-13in - Designed to be strong and lightweight, this 11-ounce bipod gives the shooter stability with minimal weight. Attaches to any Picatinny rail with a single screw. The legs lock in the vertical or horizontal position. Adjustable from 9 to 13 inches. Bipiod Weighs 11-Ounces Attaches to Any Picatinny Rail Using a Single Screw Legs Lock in the Vertical or Horizontal Position Adjustable From 9 to 13 -Inches