Did you even bother to do The slightest bit of research? This has literally been asked several dozen times since the free game came out last weekend.
As has been asked/answered...you need to finish the Red War campaign then pickup reward from tower gunsmith. Arcite doesn’t give out rewards...and he hasn’t since last December/January.
English
-
Thanks mate. I did some research, but it appears the key word I used weren't good enough.