I know NS does fix guns, at least in the last awhile, they have been doing it at least weekly.
I know it first hand because their gun repair guy always uses the same range at my club, and I pretty much go to the club weekly on the same day at the same time! I have to wait for him to finish before I can start shooting!!! He always has a pile of guns on the table. Just before Christmas I watched him trying to fix a norinco 1911.
They test fired so much they create a burrow in the berm.