Z-250 Directed Energy Engagement Weapon

The Light Rifle is a Forerunner weapon carried by Promethean Knights.

Operation
The Light Rifle, utilizing a form of hard light as ammunition, is likely to be the analog of the BR85HB SR Battle Rifle or the Type-51 Carbine. As with the Scattershot, it seems to assemble when picked up. The weapon is described by 343I as a combination of the Battle Rifle and the DMR because when fired from the hip, it sends three rounds towards the target and when scopefired, it sends a single precision round. .

Trivia

 * The Light Rifle is very similar to the Hard Sound Rifle in the way that they both use a hardened ammunition that normally (without being hardend) cannot damage a object.
 * The Light Rifle is very similar to the Halo: Reach DMR in the way that they both have 15 rounds per magazine (though, it is unclear if the light rifle actually uses a magazine ) and they are both useful at medium range and both have a zoom option (although its unclear on the magnification level of the scope). The Light Rifle holds one more round than the Halo 4 DMR.
 * The Light Rifle is also very similar to the early versions of the Battle Rifle in Halo 2, firing 3-shot bursts when fired from the hip, and single shots when scoped.
 * Despite firing in burst when aiming from the hip the Light Rifle only fires one round from the mag. This gives the Light Rifle 3 more bursts than the BR per mag and 1 more round than the DMR per mag.
 * The Light Rifle has been shown with an alternate weapon skin available for those who purchase the Halo 4 Limited Edition; this hints towards the Light Rifle being available as a primary weapon in multiplayer.

List of appearances

 * Halo 4