The AD-170S base features the Patented QD Auto Lock™ Lever system which has the following advantages:

• Does NOT require tools for adjustment.
• Easily adjusted with your fingers.
• Lever can be configured to lock to the front or the rear.
• Superior clamping surface to ensure maximum rail engagement.
• Precision machined from 6061 T6 Aluminum.
• Hard coat anodized for a lifetime of performance.
• Fully adjustable to fit both in spec and out of spec rail systems.
• American Defense MFG, LLC. products feature a lifetime warranty.
• Features the Patented QD Auto Lock™ Lever system.
• Made with pride in the U.S.A.