I have pin/welds and nfa items, not being rude but i know all this. Ima just have to find it and post it myselfIt says in the second paragraph (3) a barrel less than 16” in length. Then again in (4) an overall length of less than 26” OR a barrel less than 16” in length.
While it is true a pinned and welded muzzle device is considered part of the barrel length which is why you 14.7” barrels with a pinned and welded device. If they are not pinned and welded, it’s based off end of threads.
Now if he had a slanted hand guard instead Of a vert grip, no longer an sbr.
You are correct on measuring. It is to buffer tube end and to threads or fixed device.
You can also pin and weld a suppressor to create a one stamp gun instead of two stamp
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