The Proton Cannon is a weapon created by Tony Stark capable to be summoned at command by both Iron Man and War Machine to deliver extensive damage to an enemy.

Several variations of the cannon have been fabricated, one capable of launching a barrage of missiles instead of energy (with it's prototype launching gold-colored missiles) who has been mainly used by War Machine and an upgraded version with a different design model. The cannon can also be aim up at a 45 degree angle, allowing it to strike airborne targets.

https://marvel.fandom.com/wiki/Proton_Cannon
proton cannon