I need the largest outside diameter of a .936 gas block. I ordered a barrel from classicfirearms.com that originally said it had a .875 gas block so everything I ordered was compatible with the mid sized gas block. I am not sure I can use this rail, which has a proprietary barrel nut, with a .936 gas block. Trying to figure out if I should sell the barrel, gas block, and/or rail to make it work.