AD-509T | Holosun 509T QR Low Mount

The AD-509T QD mount is a low-profile, one-piece mount designed to accept the Holosun 509T red dot on AR pistols and other compact platforms. It is precision machined from 6061 T6 aluminum and finished with a hard coat T3 Mil-Spec anodize for wear resistance. The mount uses American Defense’s patented QD Auto Lock Lever system to accommodate both in-spec and out-of-spec rail systems. Its compact, lightweight design is intended for platforms where a minimal optic footprint is required.

Applications include mounting a Holosun 509T on an AR-style pistol for range or competition use, and installing a compact red dot on lightweight carbine or training platforms.

Product Specifications

• The manufacturer is American Defense Mfg.
• The model is AD-509T.
• The product type is Mount.
• The fit is Holosun 509T Footprint.
• The size is Low.
• The mount style is Quick Release.
• The material is 6061 T6 aluminum.
• The finish is Hard coat T3 Mil-Spec anodize.
• The color is Black.
• The subcategory is Optic Specific Mounts.
• The unit is intended for AR pistols and compact platforms requiring a small, lightweight red dot solution.
• The mount uses a Patented QD Auto Lock Lever system to secure to rail systems.
• The product description attribute lists Quick Release.
• The UPC is 810008517789.

Built for consistent installation and removal without sacrificing rigidity, the AD-509T QR Low offers a precise mounting interface for the Holosun 509T. Its combination of machined 6061 T6 aluminum construction, Mil-Spec anodize, and a proven quick-release locking lever delivers a dependable, low-profile option for shooters who prioritize fit and function in compact optic setups.