Not surprisingly, these mods affect a ship’s offensive actions. Typically, weapons mods increase a ship’s chances of hitting a target, or increase the damage done after landing a strike. There are, however, more exotic weapon mods that can guarantee successful interception of PVP targets.
You can obtain weapons mods from nearly every location, but Mars specializes in offensive mods. So if you want to make sure your ship has the offensive edge in a fight, focus on building up your Mars reputation.