Kagemitsu G4

«Kagemitsu G4» is a photon sword owned by Kirito in Gun Gale Online. Currently, it is under Sinon's possession. It is sold for 150,000 credits from the weapon store in the game.

Gun Gale Online
Kirito bought «Kagemitsu G4» because it is the only weapon he found that resembles a sword, since he was used to clashing with swords in Sword Art Online and ALfheim Online. Kirito is quite proficient with this saber, as he is able to slice up bullets flying at him. Despite being a lightsaber, it is unable to cut through all materials, as shown when pitted against the Starship Metal Estoc.

Trivia

 * It was introduced to the game by the whims of the creators to resemble the ones from the popular science-fiction movie series Star Wars.
 * It is also called "Light Saber", "Laser Blade" or "Beam Sabre".
 * After Kirito's appearance in the third Bullet of Bullets the photon sword experienced a rush of popularity, but no one was able to deflect bullets with any skill resembling Kirito's; even Sinon tried it without success.