Buggy "Liberator" (Tom Clancy's The Division)

I have a Persian with y / s from pp 190, now attention when choosing a liberator does not matter with 1 or 2 weapons, the damage rises to 210. By talents I looked, there is not one who would change the damage, and the damage changes upward from all weapons, the liberator himself out of an unselected 160 in the option worn, it comes out already with 196k damage. Sometimes, in order for the damage to increase, you need to change the weapon a couple of times, the increase hangs constantly. Who has any thoughts? If possible, check / explain what is the point. I myself think that as an option, the Liberator's body kit does not apply to the barrel itself, but to the entire Persian as a whole.