American Defense114463474
American Defense Holosun 509T Co-Witness Red Dot Sight Mount – Precision Optics for Tactical Excellence$116.50
Availability: In Stock
The American Defense Quick-Detachable Picatinny-Style Mount for Holosun 509T Red Dot Sight is a dedicated QD mount engineered to pair the compact Holosun 509T with AR pistols, carbines, and other platforms where a lightweight, quick-detach optic setup matters. Built from 6061 T6 aluminum and finished in hard coat T3 Mil-Spec anodize, this one-piece mount combines durability with the ability to swap your red dot on and off the rail without tools—ideal for shooters balancing multiple uppers, running backup optics, or simply preferring the flexibility of a quick-change system.
The mount's patented QD Auto Lock Lever system is the standout feature: it accommodates rail tolerances across the spec range, meaning it seats securely whether your Picatinny rail is tight or loose. That's a real-world advantage in the field, where used or well-worn receivers are the norm. Adjustment and configuration are handled with nothing more than your finger or a flat blade screwdriver—no proprietary tools, no fussing. The lever itself can be oriented to lock toward the front or rear of your rail, letting you dial in the mounting position that works best for your setup.
Clamping geometry is optimized for maximum rail engagement, so once locked, the mount stays put through recoil and handling without creep or shift. Whether you're setting up an AR9, 5.56 pistol, or a rifle where the 509T's compact footprint and battery life appeal to you, this American Defense mount delivers the simplicity and reliability you'd expect from a purpose-built QD solution.
| Brand | American Defense |
| Optic Compatibility | Holosun 509T Red Dot Sight |
| Mount Type | Quick-Detachable, Picatinny-Style |
| Material | 6061 T6 Aluminum |
| Finish | Hard Coat T3 Mil-Spec Anodize |
| Configuration | One-Piece Unit |
Yes. The patented QD Auto Lock Lever is designed to clamp securely on both in-spec and out-of-spec rails, so tolerance issues on older or well-used receivers won't prevent a solid mount.
Correct. Adjustment and lever orientation (front or rear lock) require only your finger or a flat blade screwdriver. No proprietary tools needed.
While developed for AR pistols, the mount works on any rifle platform or carbine with a Picatinny rail. Its lightweight, compact form factor simply makes it especially practical for shorter platforms where space and weight matter.
The patented Auto Lock Lever system tolerates out-of-spec rails without sacrificing clamping strength, and the optimized clamping surface ensures maximum engagement and zero shift under recoil. Unlike mounts requiring proprietary tools, this one is user-adjustable in the field.
SKU: 114464674 • Width: 2.25in • Height: 2.25in • Depth: 4.75in • Weight: 0.25oz
Availability: In Stock
The American Defense Quick-Detachable Picatinny-Style Mount for Holosun 509T Red Dot Sight is a dedicated QD mount engineered to pair the compact Holosun 509T with AR pistols, carbines, and other platforms where a lightweight, quick-detach optic setup matters. Built from 6061 T6 aluminum and finished in hard coat T3 Mil-Spec anodize, this one-piece mount combines durability with the ability to swap your red dot on and off the rail without tools—ideal for shooters balancing multiple uppers, running backup optics, or simply preferring the flexibility of a quick-change system.
The mount's patented QD Auto Lock Lever system is the standout feature: it accommodates rail tolerances across the spec range, meaning it seats securely whether your Picatinny rail is tight or loose. That's a real-world advantage in the field, where used or well-worn receivers are the norm. Adjustment and configuration are handled with nothing more than your finger or a flat blade screwdriver—no proprietary tools, no fussing. The lever itself can be oriented to lock toward the front or rear of your rail, letting you dial in the mounting position that works best for your setup.
Clamping geometry is optimized for maximum rail engagement, so once locked, the mount stays put through recoil and handling without creep or shift. Whether you're setting up an AR9, 5.56 pistol, or a rifle where the 509T's compact footprint and battery life appeal to you, this American Defense mount delivers the simplicity and reliability you'd expect from a purpose-built QD solution.
| Brand | American Defense |
| Optic Compatibility | Holosun 509T Red Dot Sight |
| Mount Type | Quick-Detachable, Picatinny-Style |
| Material | 6061 T6 Aluminum |
| Finish | Hard Coat T3 Mil-Spec Anodize |
| Configuration | One-Piece Unit |
Yes. The patented QD Auto Lock Lever is designed to clamp securely on both in-spec and out-of-spec rails, so tolerance issues on older or well-used receivers won't prevent a solid mount.
Correct. Adjustment and lever orientation (front or rear lock) require only your finger or a flat blade screwdriver. No proprietary tools needed.
While developed for AR pistols, the mount works on any rifle platform or carbine with a Picatinny rail. Its lightweight, compact form factor simply makes it especially practical for shorter platforms where space and weight matter.
The patented Auto Lock Lever system tolerates out-of-spec rails without sacrificing clamping strength, and the optimized clamping surface ensures maximum engagement and zero shift under recoil. Unlike mounts requiring proprietary tools, this one is user-adjustable in the field.
SKU: 114464674 • Width: 2.25in • Height: 2.25in • Depth: 4.75in • Weight: 0.25oz