Atlas Standard Height Accu-Shot Precision Rail Monopod - The BT12-QK is our standard height Precision Rail Monopod (PRM) with QK01 Quick Knob. Attaches to standard 1913 Picatinny rail. It is machined from 6061-T6 aluminum that is Mil-Spec Type III hard anodized. Elevation Range: 3.75 – 4.65in Folded Length: 3.85in Approximately Weight: 7.4oz