The AD-170S base is the shorter version of their AD-170 base. This base also fits the Atlas BT10-NC and BT10-LW17 Bipods **Will Not fit the B&T 5-H Bipod**. This mount will also fit the Magpul-17S Bipod. It is precision machined from 6061 T6 aluminum and finished in hard coat T3 Mil-Spec anodize. It features the Patented QD Auto Lock(tm) Lever system to accommodate both in spec and out of spec rail systems. FeaturesThe AD-170S base features the Patented QD Auto Lock(tm) Lever system which has the following advantages:Does not require proprietary tools for adjustment.Can be adjusted with your finger or a flat blade screwdriver.Lever can be configured to lock to the front or the rear.Superior clamping surface to insure maximum rail engagement. Materials & ConstructionThe AD-170S base is precision CNC machined from a block of 6061 T6 aluminum and finished in hard coat type 3 Mil-Spec anodize for a rock hard lasting finish.Precision machined from 6061 T6 Aluminum.Hard coat anodized for ...