I dont have a real idea version, but can you make a large missle projectile called: The "Confetti Rocket"
Projectile_ConfettiRocketThis Rocket goes for about 350 feet and explodes downward releasing 3 containers of shrapnel (each containing 33 fragments). Raining down hell.
It may if more effective, above a radius of 20 ft around an enemy (player or vehicle) at about a max of 150 feet above them.
This would render walls useless and be a huge tactical advantage if one glided over an enemy fort.
The Missile:

The Concept:
1. Missile flies over city.

2. Missile Bursts open the 3 hatches.

3. Shrapnel Rains down on your enemies.

In other words, its a scatterbomb. This one, however, flings the Shrapnel down at very high speeds, shreading up anything below it.