Unidentified master gunnery sergeant

"Huh! My ass! Well, you can forget about those adjustments to your A2 scope!"

- Master Gunnery Sergeant to SgtMaj Avery Johnson, who refused to reveal how he survived the Battle of Installation 04.

This unidentified Master Gunnery Sergeant was a non-commissioned officer in charge of Cairo Station's armory. On October 20, 2552, he helped John-117 get used to his new Mark VI armor.

Biography
Some time after John-117 arrived at Cairo Station, the Master Gunnery Sergeant fitted him with the Mark VI armor that Maria-062 had tested earlier. The Sergeant was initially annoyed with how much damage the Chief's old Mark V armor had taken, but then decided it was all obsolete anyway. The Master Gunnery Sergeant also briefed the Master Chief on the shields of the new armor. After testing the armor's energy shielding, Sergeant Major Avery Johnson arrived at the armory to lead John-117 to the ceremony held in the orbital platform's bridge. When the Master Gunnery Sergeant asked how Johnson survived the Battle of Installation 04, Johnson told him it was "classified". As a result, the Gunnery Sergeant replied that Johnson could forget the adjustments to his A2 scope he had asked the Gunnery Sergeant to make.

Later that day, the Master Gunnery Sergeant was killed when Covenant forces invaded the station. Two Sangheili entered his armory and fired upon him, and he returned fire with a shotgun. John-117, on his way to find the Covenant bomb located elsewhere on the station, entered the armory just in time to see the Sergeant killed by plasma fire. Though unable to save the Master Gunnery Sergeant, John-117 swiftly avenged his death.

Depending on the level of difficulty, the Master Gunnery Sergeant's last words are:
 * Master Gunnery Sergeant (Easy/Normal): "Get the hell out of my armory, split-lip!"
 * Master Gunnery Sergeant (Heroic): "Tell your friends I got enough ammo for all of 'ya!"
 * Master Gunnery Sergeant (Legendary): "Come on, is that a weapon or a flashlight? Oh, dangit—!"

Trivia

 * There has been some confusion regarding this character's name and rank. In the level The Armory, he is referred to as "Master Guns" by Sergeant Major Johnson. Many interpreted this as him being a Master Sergeant with the last name "Guns". However, "Master Guns" is an informal address for a Master Gunnery Sergeant, and the character's name is not known. In articles he is often referred to as the unnamed Master Gunnery Sergeant, the Armory's Master Gunnery Sergeant, or "Master Guns" (only if a direct quote from the game). This also might just be a way of Johnson to say "master of the armory."
 * If the player waits underneath the Armory away from the stairs before entering it, the Gunnery Sergeant is invincible. He will hold off the two Covenant Sangheili, but he cannot kill them and will die as soon as the player enters the Armory. On Legendary, one can wait as he takes down the Elites' shield before going up and engaging them.
 * It is possible he was the last known human to see John-117's face as of yet. Throughout events of Halo 2 and Halo 3, John-117 was never seen removing his helmet. However, there have been breaks of time where the Chief could have taken off his helmet unseen by the player, such as between several levels.
 * On rare occasion if the player move fast enough, they can kill the two Sangheili and save the Master Gunnery Sergeant. This accomplishes little, though, as he does not move.

List of appearances

 * Halo 2