Muzzle device sitting on muzzle instead of barrel shoulder

[MistWolf]

I should have said tension and it ain't Internet BS either. If compression and tension didn't occur, the threads wouldn't hold.

The most precise way to torque a bolt is measure how much the bolt is stretched. For example, the installation of the main rotor blades on a Robinson R44 is very critical. So critical that torque isn't measured in ft/lbs, but by measuring bolt stretch. Engineers base in/lbs & ft/lbs torque specs on how much it stretches the bolt.

When a muzzle device is torqued against the shoulder of the barrel, the barrel is placed under tension. The majority of that tension will be concentrated between the threads and shoulder. Stretching does occur. Over torquing the muzzle device has been observed to have a negative effect on precision.

If the muzzle device is torqued against the crown, the barrel will experience compression forces mostly at the crown.

Hmm...