ATN QDM Low Profile Dual Cantilever 30 mm Heavy – 1 out of 2 models Review

What Makes ATN QDM Low Profile Dual Cantilever 30 mm Heavy – 1 out of 2 models Stand Out?

In the world of optics mounting solutions, finding a balance between quick detach functionality, robust construction, and a low profile can feel like searching for a unicorn. The ATN QDM Low Profile Dual Cantilever 30 mm Heavy – 1 out of 2 models aims to deliver on all three fronts, offering a mount designed specifically for ATN‘s X-Sight and ThOR series of scopes. Its dual cantilever design promises rock-solid stability, while the quick detach mechanism allows for rapid swapping between rifles, making it an interesting proposition for hunters and tactical shooters alike.

I was searching for a reliable mount that could quickly be moved between my AR-15 platform and my dedicated .308 hunting rifle without sacrificing zero. I was tired of re-zeroing every time I switched optics. Unboxing the mount, I was immediately struck by its solid feel. It certainly feels like it’s built to last.

I considered mounts from LaRue Tactical and American Defense Manufacturing, both known for their quality QD systems. Ultimately, I chose the ATN QDM Low Profile Dual Cantilever 30 mm Heavy – 1 out of 2 models because of its advertised low profile and direct compatibility with my ATN ThOR LT thermal scope. I was also hoping it would provide a more streamlined look.

Initially, I was cautiously optimistic. The build quality looked promising, but I was eager to see if it would live up to the claims of retaining zero after repeated removals and reattachments.

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Real-World Testing: Putting ATN QDM Low Profile Dual Cantilever 30 mm Heavy – 1 out of 2 models to the Test

First Use Experience

My initial testing took place at my local shooting range, primarily focusing on confirming zero and assessing the quick detach/reattach functionality. I mounted the ATN QDM Low Profile Dual Cantilever 30 mm Heavy – 1 out of 2 models on my AR-15 and zeroed my ATN ThOR LT at 100 yards. The weather was clear and dry.

The quick detach levers operated smoothly, and the mount locked up securely each time. After removing and reattaching the mount five times, I was pleasantly surprised to see minimal shift in my point of impact – less than an inch at 100 yards. This was impressive.

There were no immediate issues, but I did notice that the accessory rail on the mount felt a little bit wobbly.

Extended Use & Reliability

After several months of using the ATN QDM Low Profile Dual Cantilever 30 mm Heavy – 1 out of 2 models in various conditions, including a couple of rainy range days and a particularly dusty hog hunt, I have a better understanding of its long-term reliability. The mount has held up well with no noticeable loosening or degradation of the QD mechanism. However, that accessory rail is still a concern.

I haven’t seen any significant wear and tear on the mount itself, thanks to the aircraft-grade aluminum construction. Cleaning is straightforward – a quick wipe down with a lightly oiled cloth is all it takes to keep it in good condition. Compared to my previous experience with cheaper, less robust mounts, the ATN QDM Low Profile Dual Cantilever 30 mm Heavy – 1 out of 2 models has definitely exceeded expectations in terms of durability and zero retention.

Breaking Down the Features of ATN QDM Low Profile Dual Cantilever 30 mm Heavy – 1 out of 2 models

Specifications

• Construction: Aircraft-grade aluminum, ensuring lightweight strength and resistance to corrosion. The use of quality materials is critical for maintaining zero under recoil.
• Mount Type: Dual Cantilever Quick Detach, designed for rapid removal and reattachment while supposedly retaining zero. This is the core selling point of the mount.
• Tube Diameter: 30 mm, specifically tailored for ATN X-Sight 5, X-Sight LTV, ThOR LT, ThOR LTV, and ThOR 5 320/640 Series scopes. This limits the mount’s versatility to 30mm tube optics.
• Accessory Rail: Movable Picatinny rail, providing a mounting point for lasers, lights, or other accessories. Unfortunately, it feels cheap and isn’t secured very well.
• Warranty: One year, offering some peace of mind against manufacturing defects. This is a fairly standard warranty for this type of product.
• Low Profile Design: Positions the optic closer to the barrel, purportedly improving cheek weld and stability. This is important for a natural and comfortable shooting position.

Performance & Functionality

The ATN QDM Low Profile Dual Cantilever 30 mm Heavy – 1 out of 2 models excels in its primary function: allowing for quick and repeatable optic changes between firearms. Its ability to (mostly) retain zero after repeated detachments and reattachments is a major advantage. While the main body of the mount is sturdy, the movable Picatinny rail feels like an afterthought and detracts from the overall quality.

The mount meets expectations for quick detach functionality, but the accessory rail could use significant improvement.

Design & Ergonomics

The aircraft-grade aluminum construction feels solid, and the mount is surprisingly lightweight. The low profile design indeed improves cheek weld on AR-15 platforms, providing a more natural and comfortable shooting position. The QD levers are easy to manipulate, even with gloves.

The mount is generally user-friendly, but the wobbly accessory rail is a design flaw that needs to be addressed.

Durability & Maintenance

With its robust aluminum construction, the ATN QDM Low Profile Dual Cantilever 30 mm Heavy – 1 out of 2 models is built to last. Regular cleaning is simple and straightforward, ensuring longevity.

Assuming no catastrophic failure of the QD mechanism or the aluminum frame, the mount should provide years of reliable service.

Accessories and Customization Options

The mount comes with the movable Picatinny accessory rail. The primary customization option is the ability to adjust the position of this rail along the length of the cantilever. While designed specifically for ATN scopes, the 30mm tube diameter means it should be compatible with any optic that uses a standard 30mm tube.

Pros and Cons of ATN QDM Low Profile Dual Cantilever 30 mm Heavy – 1 out of 2 models

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Who Should Buy ATN QDM Low Profile Dual Cantilever 30 mm Heavy – 1 out of 2 models?

This mount is perfect for hunters or tactical shooters who own multiple rifles and want to quickly swap their ATN X-Sight or ThOR series scopes between them without significant loss of zero. It’s also a good option for those who value a low profile design for improved cheek weld.

Those who require an extremely stable and reliable accessory rail for lasers or other critical accessories should probably skip this product, due to the aforementioned wobble.

A must-have accessory is a high-quality torque wrench to ensure proper mounting and prevent damage to the aluminum frame.

Conclusion on ATN QDM Low Profile Dual Cantilever 30 mm Heavy – 1 out of 2 models

The ATN QDM Low Profile Dual Cantilever 30 mm Heavy – 1 out of 2 models offers a compelling blend of quick detach functionality, robust construction, and low profile design. While the wobbly accessory rail is a definite drawback, the mount’s core function – reliably swapping optics between rifles – is performed admirably. At $179.00, the price is somewhat justified, especially if you already own ATN optics and need a quick detach solution.

I would personally recommend this mount with the caveat that buyers should be aware of the limitations of the accessory rail. If you’re primarily focused on quick optic changes and appreciate a low profile design, the ATN QDM Low Profile Dual Cantilever 30 mm Heavy – 1 out of 2 models is worth considering. Just don’t expect to mount anything critical on that accessory rail.