Weapon/Anti-Vehicle Model 6B Grindell/Galilean Nonlinear Rifle

"Trust the UNSC. Take the perfect tank killing weapon, then improve it."

- SPARTAN-013

The Weapon/Anti-Vehicle Model 6B Grindell/Galilean Nonlinear Rifle (abbreviated W/AV M6B G/GNR), also known as the Spartan LASER, is the UNSC's premier ground-based, man-portable, anti-vehicle, directed energy weapon. It is the strongest infantry weapon that the UNSC has. The B model has a number of technical improvements to its power system and technical systems over it's predecessor.

Free Electron LASER
The M6B, like its predecessor, operate a Free Electron LASER, a adaptable and powerful beam weapon capable of a wide variety of operations in differing enviroments. The Free Electron LASER works by accelerating a beam of electrons to relativistic speeds. The beam passes through an FEL oscillator, commonly called a 'undulator' in the form of a periodic, transverse magnetic field, produced by arranging magnets with alternating poles within a laser cavity along the beam path which forces the electrons in the beam to assume a sinusoidal path. The acceleration of the electrons along this path results in the release of a photon. Since the electron motion is in phase with the field of the light already emitted, the fields add together. Instabilities in the electron beam, which result from the interactions of the oscillations of electrons in the undulating FEL Oscillator and the radiation they emit, leads to a bunching of the electrons which continue to radiate in phase with each other. The wavelength of the light emitted can be readily tuned by adjusting the energy of the electron beam or the magnetic field strength of the undulators.

This weapon technology allows the powerful beam to be tuned to the neseccary wavelength for operation in the current enviroment, the beam adjusted by the 'guiding beam', which is emitted prior to release of the primary beam. This, along with technical systems on the weapon, allow it to adapt to almost any atmospheric condition, enemy optical impairing counter measures and objectives. However, much of the 'charge up' time is donated to not only adjusting the beam but also powering up the magnets to the required levels.

Power Improvements
Thanks to improvements in the power packs that fuel this monstrosity. The new packs have significant improvements over the older versions, allowing them to power the beam for up to six shots. The power back has been modified so it can be charged while still in the weapon or be removed and plugged directly into the charger. The charger can be equipped with its own stand along battery packs, which make it heavy, or plugged into any conventional power source, including, but not limited to, combustion engine systems, electrical power supplies, fusion power supplies, plasma power supplies or anything else the adapter socket can be fitted to.

Additional Technical Systems
The weapon now has three primary firing modes. The first is a 'dazzle' beam, in the 50 kilowatt range, that will permenantly blind unprotected organic optical sensors (eyes) and burn out enemy thermal, night vision and optical sensory gear, rendering vehicles (and Necros Mechanical forms) blind. This is a continous beam that will expand 1/6th of the power (1 shot) in around two minutes. The second is a 'low generation' pulse which uses about 1/12 of the power and is a 'infantry' kill pulse, with enough power to penetrate standard issue shield and body armour of most factions and punching inside the body, melting them internally, effectively flash frying them in milliseconds. Lasty, the main power setting, which can penetrate thick armour plating. The peak energy is difficult to measure but goes into dozens of megawatts, in excess of seventy megawatts.

The Optical Suite has been expanded, with a intergral smart target selection and priority system, like many other UNSC high grade scopes, along with a nighvision capability for spotting targets in the dark. It also features a battery meter and a charge meter, a long with a symbol showing current firing type, along with a 10x high power digital zoom. The site can be linked wirelessly to the operator's HUD, allowing them to use it as a site, operated through the neural link. This is supported by a iron site, just in case of system failure. A fire selector switch on the left side above the pistol grip, which can be operated by the operator's thumb.

Outside of that, the weapon's other features include a shroud opened and closed by a eletronically driven hydraulic system.