in my opinion it's a plasma pistol and smg a.k.a the n00B combo so what it does is the plasma pistol drains the sheilds from the enemy and then afterward you finish them off with a full auto storm with the smgIn Halo 3, Magnum primary, Plasma Pistol secondary. It's almost an instant kill combo, but only noobs use it. If you have dignity, stick to dual-sield SMGs. They can tear someone apart faster than a turret, and you regain all your speed while doing so.
magnum and magnum bro