This mod changes the laser pistol (GRA) so that it's fully automatic with doubled durability (it burns through durability really quick) and reduced reload time. It's inbetween the old laser pistol and the laser RCW in damage per second. It becomes very powerful with mods attached.

Which version should I use?
Don't get this one if you do not have Gun Runners' Arsenal. If you want the GRA laser pistol to be fully automatic, get this. If you want the regular laser pistol to be fully automatic aswell, get this one:
https://www.nexusmods.com/newvegas/mods/63938/?
I recommend getting both.