The American Defense B3 Modular Base (brand part no. AD-B3-STD) is a large mounting base sized for full-size ACOG optics. It uses American Defense’s patented QD Auto Lock System, giving you a quick-detach mount that clamps down securely and returns to zero every time it’s remounted.

Key Specifications

• Sized for a full-size ACOG optic footprint.
• Built as a B3 Modular Base, the larger option in American Defense’s modular mount lineup.
• Uses a quick-detach lever for fast removal and reattachment.
• Backed by American Defense’s patented QD Auto Lock System.

Frequently Asked Questions

What optic does this base fit? It’s sized for a full-size ACOG optic.

Is this a quick-detach mount? Yes, it uses a quick-detach lever built on American Defense’s QD Auto Lock System.

Buy the American Defense B3 Modular Base

Mount your full-size ACOG with quick-detach confidence from American Defense Mfg. Browse more scope mounts and order from our Lubbock, Texas gun shop for fast, insured shipping.