Welcome check out LaRue
Welcome George. I have had good luck with LaRue single piece quick disconnect mounts. I have a couple of LT104-1 mounts that are flat, but you can get 10 and 20 degree long range mounts as well. I agree with Butchman on low and strong mounting systems and this one is strong, but it is a little tall for a 40mm. It should hold a 50mm nicely. They are not cheap, and you get a little better deal if you buy a scope/mount combination. Since you already have a scope, an LT104-1 would set you back $210 plus shipping and maybe tax. This is for the one with quick detach levers and you can save $50 by eliminating them from your order. The QD mount I use on a different rifle returns to zero when dismounted and remounted, so if you want to swap optics, this is a solid option from my limited experience. The LT104-1 on my FNAR doesn't have levers as I don't intend to remove it. I understand that there are may heavy duty scope mounts available for less and the LaRue may be overkill for a casual shooter like myself. I have, however, broken and loosened ring mounts on other firearms, and I am pretty confident that even I will have a hard time breaking a LaRue on a 7.62x51 firearm when the rings are set with blue Loctite.
While your on the LaRue site, be sure to check out their 7.62x51 OBR which starts at $3,370. Like the FNAR, it can be had with a 20" or 16" barrel, has a 10,000 round barrel life and is guaranteed 1 MOA. This is for a DI gun! My FNAR is looking better all the time and I hope yours is too.
