Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Enjoy free shipping during the holidays! Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC and to all U.S. Military APO/FPO/DPO addresses.

Enjoy Our Extended FREE RETURNS

We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later). We'll even cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
AIM Sports Inc Trijicon MRO Mount Absolute CO-Witness
Currently Unavailable View Product
Compare (0)

Solid enough, strange bolt size

by Johnny RC, from MT, United States Written on April 6, 2020
Ok, so I bought a Midwest Industries QR mount for my MRO, but it's backordered for a couple months everywhere I looked, so I bought one of these to get by. Seems solid, comes with 2 sets of screws (which is nice), and mounted up easy enough. HOWEVER, the bolt on the side for mounting to the top rail is a STRANGE size that doesn't fit any standard socket. I tried Standard and Metric, it would NOT fit any of them. 11mm, 7/16 and everything close to that, none of them would fit. So, you can't torque this with a Wheeler torque wrench or what have you. I ended up using some slip joint pliers I have with nylon teeth so I wouldn't mar the finish. I don't think I would recommend this as a primary mount, but as a stop gap while I wait for one that's on backorder, it will suffice.
Would recommend: Yes
Was it helpful to you? Yes | No