You know what I want to see? I wanna see a Bow.
Not a crossbow, like an actual bow. Call me biased, and this is completely based off of the stuff I see on TV *cough*GaimSonicArrowDX*cough* but both Forerunners and Covenant have used non-ballistic weapons, and both also have immaterial melee weapons such as the Energy Sword or Hardlight blades.
Imagine this:
A bow that:
1. Has a bladed edge, allowing it to be used as a higher-than-normal melee weapon when you press RB, similar in ways to the campaign Brute Shot. This uses up ammo.
2. Uses %-based ammo
3. Has multiple firing modes:
a) A single, quick tap fires a single energy arrow that deals about the same damage as a DMR/BR/Utility weapon, but it has a slow draw and fire rate. This should take 5 shots to kill - 4 for shields, 1 with a headshot. At this point, the arrows should disappear at medium range.
Hold it down for longer and the arrow will use up more % of energy, will physically be larger, cover slightly more distance, and do more damage. Naturally though, draw time increases, thus, damage decreases. At max damage, the arrow leaves a trail of energy in its flight path; nowhere near the beam of energy from a binary rifle, but a lot more...particle-y. Max damage is approximately 2.5 times the damage of a single arrow, thus requires 3 shots to kill - 2 for shields, and then 1 more on a shield-less Spartan for an instakill. Of course, you can simply use a single tap for a headshot. At this point, the arrows should disperse at the same range a sniper can cover.
c) Hold it down about a second after max draw and you begin a lock on process, similar to the Plasma Launcher of Reach. After 3 locks, it fires what is basically a light show of 3 energy arrows towards the locked on target. These 3 arrows can minorly adjust their flight path to try and hit the target; however, they fly slower than the usual arrow and can easily be blocked by objects, or even other projectiles. If all 3 hit the locked target, a Spartan, it just about guarantees a kill unless the Spartan has an overshield. To lock on you MUST maintain reticle on target so it's red. This has a massive drain on the remaining % of energy left in the weapon.
4. The twist: There is NO Scope. There's a highly accurate hip-fire reticle but that's it. As you hold the trigger longer you slowly zoom in, but this zoom at max shouldn't be more than the 2x zoom of a BR.
5. Not hitscan. Firemodes A and B should have the same bullet speed, but C should be quite a bit slower.
Essentially, this is a powerful utility sniper with a potentially high ammo count, much higher RoF than the average sniper but not as fast as a basic utility weapon, and the requirement for amazing aim and compensation for bullet travel time by the user. It also offers close range combat power, and is in essence a glass cannon; high risk, high reward, it places itself on the line in between utility weapon and power weapon, allowing skilled users to truly stand out when using such an armament.
Oh, and since it's energy-based, it'll have LOTS of flair.
edit: that emote man can't I just write b ) in peace