This pumped action grenade launching weapon is not seance much in the Mojave. The gun fires the 40mm grenade, that is also loaded in the Rifle counter part. It is heaver then the rifle model but holds more ammo. Not one faction uses this, well, besides the boomers.
nice seems like a china lake X3
if you have a look at the holor rfle from the dlc dead money they are very simaluar (just look at the way u reload them)
The what rifle? Never herd of it.