It upgrades as the campaign progresses near the end of the game.
The gravity gun is from the Half Life series, not Halo. This is unobtainable and does not exist in any Halo game.
NO!
CrowbarZero-Point energy field manipulator (gravity gun)Pistol357 MagnumSMGOverwatch Standard Issue (pulse rifle)ShotgunCrossbowGrenadesRPGOther Weapons featured in Half life 2: Deathmatch:SLAM (Selectable Lightweight Attack Munition)Stinstick
You upgrade the first machine gun.
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No
You can't, but Half Life 2 Episode 3 supposedly has it.
You can't
yes u can get gravity gun in halo 2
you only can upgrade any weapon once
You can't
you cant upgrade it twice