Gotva Prime was the original primary Grineer weapon back before, and during, The Old War. Chipper's a smart man, he could probably source it for Kahl somehow...If nothing else, he'd probably loot it from Baro's ship hahah.
Actually yeah, that would be a great new mechanic. And possibly a short-quest! Chipper wants your help looting a ship looking too shiny for this part of the system, so we help him loot it. Only later do we get a message from Baro requesting assistance to help watch over his ship, and catch whoever is stealing his precious cargo. But in the end we decide to keep to Chippers side because of Baro's snobby attitude in the past (and maybe depending on if we bring a Prime Warframe or not, in the present too). We continue and go on as Baro's personal bodyguard for a mission or two, and ignore Chipper entirely as he snatches things up from the ship, and maybe even supply line. In the end, Baro thanks us for our help despite us not finding the perpetrator, and we get a little bit of what Chipper stole. In the form of a single random item (or maybe armor set) from Baro's loot pool every week.
This way, we wouldn't have to do his mission every week, just for the week we see something useful, every other week being ignored entirely.