Magpul Industries Universal Carbine Stock Fits 1913 Picatinny Rail Side Folding Adjustable Length of Pull Matte Finish. To accommodate the wide variety of charging handles styles ejection port locations and control locations the UCS features a reversible hinge for left and right folding configurations and five degrees of drop for clearance. Specifications for Magpul Industries Universal Carbine Stock Fits 1913 Picatinny Rail Side Folding Adjustable Length of Pull Matte Finish: Manufacturer: Magpul Industries Additional Features: Stock Fit: 1913 Picatinny Rail Case Finish: Matte Blade Finish: Matte Finish: Matte Features of Magpul Industries Universal Carbine Stock Fits 1913 Picatinny Rail Side Folding Adjustable Length of Pull Matte Finish: Six (6) Position Push-Button LOP Adjustment Allows Three 3 of Total Adjustment" Package Contents: Magpul Industries Universal Carbine Stock Fits 1913 Picatinny Rail Side Folding Adjustable Length of Pull Matte Finish