Needle cannon

The Heavy Needler is a much larger and more powerful version of the Covenant Needler. It is featured in Halo Wars, and is the main weapon of the Vampire, a Covenant Air vehicle. The Heavy Plasma Turret can be upgraded to feature this weapon as well if you choose to upgrade the turret with an Anti-Air weapon. It was vaugley mentioned in The Fall of Reach, described as a large version of the normal needler round.

Trivia

 * It seems the Heavy Needler replaces the AA Wraith Fuel Rod Cannon as an anti-aircraft weapon.