Lily's Assault Carbine

The  is a weapon in Fallout: New Vegas.

Characteristics
Lily's Assault Carbine has the appearance of a normal Assault Carbine with a suppressor mod. But if the player (you) obtain it, the supressor will not be shown. It's hidden but if you fire with it, you will notice that the "gun sound" sounds like a silenced weapon. It also works like a silenced weapon with the exception of that you can't see the silencer

Locations
Lily has it, but it's hidden because it's a non'playable weapon, but you can probably use console commands or try entering casinos back and forth to obtain it.

More importantly, it does not seem to use the same 5mm ammo as the regular assault carbine, instead the ammo used is something called MCA. MCA stands for Magical Companion Ammo in which is a special ammo only used by companions. The MCA is also infinite.

Appearances
The appears in Fallout: New Vegas.