Good luck. If you can get your hands on a Geth Pulse Rifle, I'll be very impressed.

On the subject, started the final mission(s) on ME3. I hope I did enough to save my squad. I'll never forgive myself if Tali and Garrus die.

Some info on how to procure one would be nice.

And what do you mean by "did enough"?

First, switch difficulty to "Veteran" or "Insanity." Then recruit Tali. It's in the last room with her. I have one on two profiles, and they were a pain to get.

You have to amass enough allied forces (given numerical values depending on their worth) to prevent terrible things from happening in the last mission. I have... nearly enough for a perfect playthrough. I hope. Gotta' do more multiplayer and turn my multiplayer characters into single player assets.

Nah, just go to Hardcore. Hardcore and above for the Haestrom mission gets the pulse rifle.

Alternately, get the DLC Mattock if you can. That's a really nice gun.

Geth Plasma Shotgun is the best weapon, though.

Not arguing with either of those. But Xin's made it clear where he stands on DLC.