Can R500 Memento be main?

[Yokedici]

From the beginning i wanted to play with pistols and with my wish i picked R500 Memento and oh my god, this weapon is so powerful. Incredable damage and i am loving it so far. To mention, i am level 33 and i dont even carry a second weapon. And when i dungeon with people, my DMG never dissapoints me so far.

My question is, if i make a fast gunner build and keep Memento as main, what is my chances in PVP? What do you think?

[Sacred)(Rhaine]

Its a great weapon, the only downside it has is that its built for weak spot hits and some enemies have no weak spot.

[Mellow]

in pvp its pretty easy to miss, let alone hit weakspot, so you'll run out of ammo in 3 shots having to reload which is pretty bad i guess.
And I suppose in PVP people run with the set / stuff to reduce head damage taken.
So IMO not great for pvp. A beast in PVE though for sure