AD full size HD base for Trijicon ACOG

• Quick-detach repeatability: The patented QD Auto Lock lever system lets the mount come off and go back on a Picatinny rail quickly, which is useful for transport, maintenance, or swapping optics without turning the rifle into a workshop job.
• Rearward cantilever position: This full-size ACOG mount shifts the optic farther back, helping solve eye-relief and head-position issues that can appear with prism scopes on AR-pattern rifles and similar platforms.
• HD dual-lever security: The HD configuration uses a second throw lever for added clamping security, giving the mount a more planted feel on hard-recoiling rifles or rifles that see frequent optic removal.
• 6061-T6 aluminum construction: The aluminum body keeps weight down while still providing the rigidity expected from a serious tactical mount, so the rifle stays practical to carry and fast to handle.
• Made in the USA: American-made production and ADM’s focus on firearm mounting systems make this base a strong fit for shooters who want a purpose-built ACOG mounting solution rather than a generic rail adapter.

About the - Series

American Defense modular ACOG-style bases are built around the company’s approach to quick-detach mounting: secure rail engagement, repeatable positioning, and straightforward handling in the field. Within ADM’s lineup, these mounts sit in the part of the catalog aimed at shooters who use prism optics, compact tactical sights, and other specialty optics that benefit from a dedicated footprint rather than universal rings. The design emphasis is practical rather than decorative, with robust lever-locking hardware, low-profile bodies, and geometry tailored to common rifle platforms.

A defining feature across the family is ADM’s patented QD Auto Lock lever system, which is designed to fit both in-spec and out-of-spec rails without proprietary tools. In use, that matters because a mount like this is often chosen not just to hold an optic, but to make removal and reinstallation predictable and fast. The series is therefore well suited to tactical optics, duty-style carbines, and hunting or utility rifles where an optic may need to be moved, serviced, or replaced without a complicated re-zero process. The result is a mount family focused on repeatability, secure clamping, and platform-specific fit.

About the AD full size HD base for Trijicon ACOG

The AD full size HD base for Trijicon ACOG is a dedicated prism scope mount for full-size ACOG-pattern optics, built for shooters who want a stronger quick-detach interface and a more useful optic position on the rifle. Its cantilever layout places the optic farther to the rear than a conventional straight mount, which helps achieve a more natural cheek position and a less cramped sight picture on rifles where rail space, backup sights, or stock setup can otherwise limit placement.

What sets this version apart is the HD dual-lever arrangement. Compared with a single-lever design, the second lever adds extra clamping support across the rail, which is especially valuable on rifles that see heavy use, repeated optic changes, or more demanding recoil. ADM’s QD Auto Lock system is also practical in day-to-day use because it can be adjusted without proprietary tools, making it easier to tune the fit to the rail and keep the mount working across different hosts.

The body is made from aluminium, keeping the mount light enough for a fighting or field rifle while still providing the stiffness needed to support a prism optic properly. As a result, this ADM mount suits shooters running Trijicon ACOG optics on Picatinny-equipped rifles who want fast removal, solid return-to-rail consistency, and a mount geometry that improves real shooting ergonomics rather than simply attaching the optic to the gun.

About American Defense

American Defense MFG, LLC is based in New Berlin, Wisconsin and focuses on mounting systems and firearms built in the United States. The company is particularly well known for its quick-detach optic mounts, covering applications from red dots and magnifiers to thermal and night-vision devices, as well as mounts for lights, lasers, bipods, and tripods. That broad catalog matters here because it shows a specialist approach to interface design rather than a general-accessory background.

A key part of ADM’s reputation is its patented QD Auto Lock lever system, which is used across much of the mount range and is intended to give secure engagement with a wide variety of rail dimensions. In addition to mounts, the company also produces fully ambidextrous AR-15 and AR-10 pattern rifles. For shooters choosing a tactical mount, ADM’s strength lies in combining American manufacturing, platform-specific fit, and a long-running focus on repeatable optic attachment systems.

Main Features

• Manufacturer: American Defense
• Product type: Complete mount
• Compatibility: Trijicon ACOG full-size pattern optics
• Rail interface: Picatinny Rail
• Mount type: Detachable, repeatable tactical mount
• Material: Aluminium
• Made in: USA
• Warranty: 10 years

Warranty

American Defense provides a 10-year warranty for this mount. That stated warranty period gives clear long-term coverage for a component intended for repeated installation, removal, and hard field use.