Head Gunner

Head Gunner is the name of two enemies in Mega Man X3.

Head Gunner masspro
Head Gunner masspro (ヘッドガンナー・マスプロ) is a mass-produced Head Gunner in Mega Man X3. It can only shoot missiles. Except for Doppler Stage 1, this version of the Head Gunner replaces all Head Gunner customers once Blast Hornet's stage, the weapons factory, has been cleared.

Head Gunner customer
Head Gunner customer (ヘッドガンナー・カスタマー) is a customized Head Gunner in Mega Man X3. Unlike the mass-produced version, this one is equipped with a secondary set of guns and stronger armor. It appears in the Opening Stage, Blast Hornet's stage, Gravity Beetle's stage, Toxic Seahorse's stage, Volt Catfish's stage, and Doppler Stage 1.

Rockman X3 manga
Head Gunner customers are among the Mavericks that attacked the Neo Maverick Hunter Base. More Head Gunner customers appeared interrupting X while he was fighting Crush Crawfish. Head Gunner customers also fought alongside other Maverick minions against Blast Hornet, Blizzard Buffalo, Neon Tiger, Tunnel Rhino, and Volt Catfish. Head Gunner Masspros are also seen among the other X3 Mavericks ready to fight Blast Hornet and Zero, referencing the replacing from the game.