If their guns weren't coming (however indirectly) from a sporting goods store or gun show in the U.S., they'd be coming from a freighter straight from China.
You will cut into their profits,
I was with you right up to that last statement.
Before Clinton stopped the import of Chinese firearms to the U.S. it was possible to buy a brand new Chinese SKS rifle for $50 dollars on the retail market.
We may make it less convenient for them to purchase arms, but if we force them to start buying guns & ammunition directly and in quantity from the Chinese they'll actually save money. LOTS of money.