We wouldn't sell Armenians weapons in the first place. What do you want to buy from Turks when they don't offer you anything?
What I want to say, even if it is good for Turkish economy to sell weapons to Armenia or open borders with Armenia for trade and prosperity. Turkey won't do that. We have backbone and won't let Azeri down what ever the cost will be.
Russia is not like this. They sell arms to Azerbaijan, have good relationship with Turkey and Azerbaijan, have all kind of projects with us while Armenia is getting left behind in the cold more and more. One day will come when Russia will toss Armenia in the hands of the Azeri to please the Turks.