Wow that's great--I can only hope to get out that far someday. Supposedly USSA here in Tulsa is buying a bunch of adjacent land and planning to put in at least a 1000 yard range, but they're hoping to be able to get out to a mile which would be wild. Apparently the person who owned everything around them was trying to sell it as one parcel for development, but because it's all lowlands and drainage it never sold. It's passed to the next generation now and they're more willing to split it up.I've got basically the same rifle. Odin works adjustable gas block too. Geiselle trigger was the only other mod I've made. Suppressed, I've run it with 168FGMM out to 900 yards at Fouled Bore. You'll love it when you get to use it. A little heavy for spot and stalk hunting, but I'm a glutton for punishment anyway.
I like the Geissele triggers, but I'm not sure I'm a good enough shot yet to justify the extra expense. I knew I wanted something better than mil-spec though, so the Hiperfire was a nice middle ground. I've toyed with the idea of using it for deer, but I'm really tempted if I can get it sighted properly sighted in and tuned.