We've got a ton of USMC and Army customers using the FDAC that are firing MK11's, and M110's with S&B, Premier, and Leupold optics. The FDAC tracks dead nuts with both of those systems (M110/Mk11) when using the 2550 or the 2600 fps slide that comes in the kit (5 slides total).
They can be purchased from our distributers at the following links: