Yes you will keep the weapons, but you can only mount them according to the specs of that freighter. Say your fighter has 4 lvl 6 guns, and the freighter only has 2 gun spots, both lvl 5, then you might as well sell the guns. But all in all, you DO keep your guns, and everything else: cargo, nanos, shield, etc....

As Chiggy says, you keep the weapons. But freighters usually only have 2 forward firing guns and the rest all gun turrets. Nice thing about the turrets though is that they all can fire forward! Thus you can bring a lot of fire power on any target.

I flew a freighter for a while, but kept my fighter guns for when I wanted to switch back.

Juni: "Trent, we've got to go faster!"