I am not sure that Ruger followed DPMS’s AR-10 pattern. This is more of a standard AR-15 pattern with a modified mag well for the 308 mags. The upper looks exactly like a AR-15 upper with a few differences in the machining.

I have yet to test it with the gas block turned off and now I am wondering how those factory Nosler 125 BTs would behave with it off. Have only shot the rifle with the gas block in #1, and #2 so far.

Should have it out this weekend for more testing.