The only reason to be able to remove it would be to change out the gas block and handguard.
If you are happy with the set up and will NEVER want/need to change those, then no. There is no need to be able to remove it.

You are correct. If it is pinned and welded it's considered in the OAL of the barrel.



There are two types of gun enthusiasts ... Those who have been F#CKED by PTG and those who will be!

~ unknown