The K3G4 is a 20 round assault rifle that possessed the capability of penetrating flak jackets. This gun was used in the Syphon Filter trilogy, and was classified as a assault rifle, even though it was fired one handed. The design is nearly identical of the PK-102 assault rifle from Syphon Filter and 2, but excludes the stock.
Strategy
Be aware of your ammo count, more so than any other weapon. The K3G4 will shred through enemies in a split-second but leave you vulnerable to counter-attacks during reloads.
Reserve this weapon specially for flak jacketed enemies when you're in an emergency. It should only be used if your ammunition is zero for every other weapon or if you really have to take down enemies as fast as possible (case in point, when stopping the missile in Syphon Filter). An example is when you're escorting a defenseless character, like in the stronghold catacombs in which you must protect Phagan.
Trivia
Aside from the Desert pistols and the Barrett M82 50-cal sniper rifle, it is the only weapon in the game that can kill flak jacket-wearing enemies without headshots, leaving the armour for the player to pick up.
This weapon relates the media myth of 'Teflon' bullets that can apparently pierce armour. In reality, this would have no effect whatsoever on a weapon's penetration power.
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