|Manufactured:||2007 (Introduced in Halo 3)|
|Occupation:||Anti Tank Launcher|
|Cartridges:||Series 6971 Battery cell;'|
The Weapon/Anti-Vehicle Model 6 Grindell/Galilean Nonlinear Rifle also known as The Spartan Laser, is the UNSC's ground-based, man-portable, anti-vehicle, directed energy weapon.
The M6 Spartan Laser is a man-portable, shoulder-fired, directed energy weapon used by the UNSC. When the trigger is pulled, a red targeting laser is painted on-target accompanied by an audible whine as the weapon cycles up. The Spartan Laser will then charge for approximately two to three seconds before discharging the main laser. As the Spartan Laser charges, the charging tone gets noticeably louder and increases in pitch until the laser is fired. If the target moves out of sight or the operator needs to relocate, the firing sequence can be aborted without discharging the battery as long as the trigger is released before the weapon actually fires. The laser is capable of penetrating several enemies or vehicles, and has a small blast radius, injuring targets within two meters of the point of impact and toppling light vehicles. It has an offline sequence between shots while it (presumably) cools down (approximately 2–4 seconds), and is highly effective at destroying enemy vehicles.
In Halo 3 Multiplayer, if you kill another player with the Spartan Laser, you will receive the Laser Kill medal. It is likely awarded due to the difficulty of having to charge and aim the weapon. Also, the achievement "Two for One" is unlocked by scoring a double kill with a single laser shot in any ranked free-for-all playlist.
The weapon is not available in the campaign until the level The Covenant, in which John-117 begins the level armed with the Spartan Laser. There is another Spartan Laser lying nearby on the ground near the Pelican, presumably dropped by a Marine when it was shot down. The M6 is the only weapon able to harm 343 Guilty Spark on the final level of Halo 3, with the exception of the Fuel Rod Gun and Rocket Launcher, through a glitch that Bungie has removed.
It was developed as a part of Project GUNGNIR, which created a MJOLNIR variant alongside the M6 Grindell/Galilean Nonlinear Rifle.
The Spartan Laser is the most powerful weapon in Halo 3, combining long range with a lethal, sudden force. The weapon is classified as an anti-infantry and anti-vehicle weapon, making it a weapon that can destroy almost anything in the operator's path. All destructible vehicles are often destroyed in a single blast, except in the case of a near miss, in which case the target will still suffer heavy damage. It can also strike and kill multiple opponents and vehicles if they are lined up correctly. It is more powerful than the rocket launcher, and since the main beam travels instantly, it can be used far more easily and reliably at range.
As with all powerful weapons, there are a few disadvantages. The Spartan Laser needs to charge for three seconds (four seconds after TU2) before firing, and requires another two to four seconds to cool down after firing. The laser depletes 20% (25% in Halo: Reach and Halo 4) of its battery's charge per shot, giving it only five shots (Four in Halo: Reach and Halo 4) at most.
Also, the targeting laser gives away the operator's position. If a player sees the targeting beam, they could possibly dodge the shot, thus wasting valuable battery power, though this is very unlikely, as the targeting beam is very faint and hard to see in the midst of battle. However, it is possible to hear the laser if you are near the operator, and can thus enact a countermeasure to prevent the operator from striking.
In addition, a point blank shot is not recommended, as you can commit suicide through splash damage, in addition to the aiming skills required to perform such a maneuver.
Finally, the laser is infamous for the difficulty in aiming the weapon, being nearly impossible for inexperienced players to engage quick, erratically-moving targets. This is caused by the charging time, which mandates that the player keep an accurate lock on his opponent, lest the laser discharge in vain.