B.E. Meyers has announced a new optic mount for M2, M2A1, and M3 series of .50 caliber heavy machine gun platforms. The BOARS-M2 is a two part low profile QD optic mount. A base is installed onto the receiver and then the mount is attached.
This replaces the older TVS-5 mount. While the TVS-5 mount allowed optics to be mounted to M2 machine guns, it sits very high over the gun. The other problem is that it gets in the way of the grip/butterfly switch and impedes disassembly. Since the BOARS is QD, you can access and perform maintenance faster and easier.
Take a look at the video they posted on their Facebook page.
Go to Bemeyers,com for more info.