"Boosted" weapon trait

I'm familiar with the Calibrated > Refined > Advanced > Superior tiers, but what is "boosted"? So, I have a "Boosted Refined Lawgiver". Only Refined tier, but it's doing 200 damage with no damage-boosting mods. Meanwhile, I picked up a "Professional's Advanced Lawgiver" which is Advanced tier and actually has depleted uranium rounds as a mod, and it's only doing 159 damage. I've also got a baseline Advanced Lawgiver with no mods and it does 145 damage. So, what the heck is boosted ?