Many moons ago I built myself a SPR style upper with an 18” Noveske barrel with a pinned switch block. I finally got a 5.56 SOCOM suppressor, so last night I took off the Smith Enterprises Vortex FH (which came off easily) and attempted to place a Surefire SOCOM FH on the end of the barrel.
After cleaning the threads of the flash hider and barrel with acetone, I went ahead and put the FH on by hand. After 7-8 turns, it was unusually tight. Stupid me, I went ahead and used my torque wrench at 25 ft-lbs. For the love of me I cannot get it down to seat with the shoulder and now I can’t screw it back off even with the torque wrench at 35 ft - lbs. I had the upper on a Geissele reaction rod, but I’m not comfortable torquing it any harder than that.
So I’m guessing my threads or the FH is out of spec. Any thoughts on what I should do? I would prefer to ship it to a gunsmith at this point. I fear I may have ruined the barrel and the threads :-(
Edited to add: I live in Indiana, so any recs for a good smith in the Ohio or Indiana area are welcome
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