Okay, I got my barrel back from ADCO
Fast turnaround, etc as usual.
Barrel cut to 1/2 x 28 threads for SilencerCo rimfire specs
Now that I have it back, I can't thread any of my 1/2 x 28 muzzle devices on by hand. I tried 4 different muzzle devices from a SilencerCo flash hider, an A2, Ballistic Advantage Kuuma, and a thread protector. These items thread onto my other AR barrels fine by hand basically all the way to the barrel shoulder. I can't get any of the devices beyond the 1st thread on the ADCO cut barrel...
Checked a bunch of times to ensure that I wasn't cross threading, no damage to threads, on either side (barrel or muzzle device), tried some lube, grease, oil...but no luck
Haven't busted out a wrench to thread further, as I had never needed to do that before on any other AR barrel with 1/2 x 28 threads except to torque to final torque settings.
Suggestions?
Thanks,
Michael