Geth Spitfire: I have messed around with it a bit and its pretty good. Over 1000 bullets. If you run out of bullets in clip then it starts eating your extra ammo without stopping. Its pretty much a mini gun. I am impressed with it but it is a tiny bit shaky. Even putting stable mod on doesnt help one bit.
Venom Shotgun: Now I really want to like this gun. Its powerful. Very powerful. My problem with it is that you have to be very accurate as it shoots a energy ball as its ammo. So if a guy is running you must time ahead of him. The grenade launcher is really nice but best used at far range. Short range shots do not seem to be very damaging. If you miss or shoot the floor with grenade launcher that ball breaks into like maybe 6 to 8 little mini grenades. Regular shots are also strong. If you shoot for their feet you can launch enemys up in the air.
I could go on with the other guns butt these two guns are the only worthy N7 guns added in my opinion. Spitfire could be better than Cerberus Harrier or Typhoon. Venom is arguable the best shotgun in the game. So lets see what you all thought of these or any other new guns.