The American Defense AD-509T Mount in a Low configuration (brand part no. AD-509T-L-STD) was developed specifically for the Holosun 509T red dot, built for AR pistols and other platforms where a small, light red dot system matters. This Low height option sits the optic close to the rail for shooters who don’t need a co-witness with iron sights. American Defense Mfg machines the mount as a one-piece unit from 6061 T6 aluminum, finishes it in hard coat T3 Mil-Spec anodize, and builds in the Patented QD Auto Lock Lever system to accommodate both in-spec and out-of-spec rail systems.

Key Specifications

• Developed specifically for the Holosun 509T red dot.
• Sits at a Low mounting height, close to the rail.
• Machined as a one-piece unit from 6061 T6 aluminum.
• Finished in hard coat T3 Mil-Spec anodize for durability.
• Uses the Patented QD Auto Lock Lever system for a secure, repeatable mount.
• Accommodates both in-spec and out-of-spec rail systems.

Frequently Asked Questions

What optic is this mount built for? It was developed specifically for the Holosun 509T red dot.

How does the Low height differ from other AD-509T mounts? It sits the optic closer to the rail, without a lower 1/3 co-witness.

Buy the American Defense AD-509T QD Mount for Holosun 509T, Low

A purpose-built mount beats a generic one every time, and this American Defense AD-509T is machined specifically for the 509T. Order it from our Lubbock, Texas gun shop for fast, direct shipping and add a secure red dot mount to your build.