Highlander: The Animated Series (1994)

S1E3 The Last Weapon

Quentin's clan in Dundee faces a brutal assault from raiders commanded by the ruthless Mohar, who wields a functioning machine gun. In a desperate bid to reclaim his clan's plundered resources, Quentin seizes the weapon for himself. However, as he grapples with the gun's lethal capabilities, he finds himself increasingly drawn to its destructive allure.