"You know, once upon a time, we didn't put onboard AIs into our weapons." The grim Exo looks over the auto rifle. "Those were dark times. Things are much more interesting now."
He sets to work, making minuscule adjustments to the auto rifle's frame. "Programs can do a lot, but sometimes you just need to get your hands in there…"
The nanites apparently take his lead, because when he finally returns the weapon to you, the balance feels better, the weight adjusts in your hand to perfect levels as you hold it. Banshee's grin is wicked and joyful. "One last set of calibrations. Call it high-impact testing."