I absolutely enjoy my scarH. Best 308 rifle I have owned to date.
My rifle currently sits in the neighborhood of 8000 rounds fired. I have shot 3gun and multiple other competitions, plus regular practice and a few rifle classes. I run the rifle both with and without a suppressor. Muzzle device is the Surefire scar flashider, suppressor is the old FA762SS reflex can. I've ran everything from iron sights only to Aimpoint M4S in Larue mount to multiple Leopold scopes and Larue mounts. As of yet, my scarH has behaved itself and never eaten an optic. However, I have two mags with cracks forming at the back edge behind the feed lips. Both still work and are range only mags. In all actuality I have used the same 6 mags for the past 4years of use. Two mags are coupled together in a cheapy FAL mag coupler. It works but isn't pretty.
I've noted the recoil impulse has gotten more harsh over the past few thousand rounds fired. In fact my rifle will run Hornady 168AMAX match ammo in suppressed mode w/o a suppressor attached.
From others experience I have wanted to play with the gas control screws on my scarH. I was really interested in tuning it down some for suppressed shooting.
I ordered up the 1.30mm, 1.35mm, 1.40mm, and 1.45mm screws from Midwest gun works. I went to the trouble to clean, PB blaster prep, get the correct sized screw driver for the gas screw hole in the gas manifold, and fit the gas screw itself. And promptly have the gas screw shatter when I tried to unscrew it from the manifold. The top portion of the screw with the cuts for a flat head screw driver just came right off the top of the screw. Yippy.
So let this be a warning to others. If you have a high round count gun like mine, be prepared to go even further then just unscrewing the gas screw.
I will be off to my uncle Timmy's machine shop next week to see about milling that bastard out of the gas block.