Threaded barrel on an AR pistol is irrelevant regardless of the configuration because the magazine attaching outside of the pistol grip is an evil feature.
A bullet button is no longer an acceptable compliance device, so a bullet button would mean NOT a fixed magazine.
So once more:
If the AR pistol has a fixed magazine, it is not an AW, so the features don't matter.
If it doesn't have a fixed magazine, it IS an AW, so no other features matter.
There is not now, and never has been a reason to pin and weld the muzzle device on an AR pistol. The *ONLY* reason to pin and weld a muzzle device is to meet the NFA minimum barrel length of 16" for a rifle, or to meet the California minimum 30" OAL for a SACF rifle.
A bullet button is no longer an acceptable compliance device, so a bullet button would mean NOT a fixed magazine.
So once more:
If the AR pistol has a fixed magazine, it is not an AW, so the features don't matter.
If it doesn't have a fixed magazine, it IS an AW, so no other features matter.
There is not now, and never has been a reason to pin and weld the muzzle device on an AR pistol. The *ONLY* reason to pin and weld a muzzle device is to meet the NFA minimum barrel length of 16" for a rifle, or to meet the California minimum 30" OAL for a SACF rifle.





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