12.7 group buy Faxon gas block troubles

[grayfox]

As a brief re-hash, it was difficult logically to conclude, IMO, that 2 gas blocks from 2 diff mfr's would both be too small, by the pretty much same amount if I judge from their similar almost-fit onto the barrel, sticking in the same spot, refusing to spin - both acted much alike -- what was the common item in this? the barrel's journal. I tried the barrel freeze/GB heat combo to get the gb on and it resulted in the GB going part-way on, then sticking in place, misaligned as well. That's where this thread commenced. The problem was that the barrel and GB were stuck together. I know that nitriding is not SUPPOSED to change the dimensions any, but well, here we sit. All my previous builds have gone barrel/gas block just fine, no problems. Either something was out of spec or the gremlins finally caught up to me!!

Now, to continue, I placed the entire barrel/stuck gb in the freezer to chill them, then with help of a rubber mallet and block of oak I was able to knock the gb down and off of the barrel.
Off to the Autozone and pick up some lapping compound. Using that compound and a 12-ga mop I lapped several times inside the gb. But I also did some lapping on the journal. Now finally at last I got the 2 to fit, still very snugly. The journal looks a little "bronzed" rather than the original dark choco-black, but they fit together, so that's my ultimate aim.
Rifle is now completely assembled but I am still waiting on my red dot... then out for the test firing (to see whether I will also have brass gouging or not...)...