During the first incursion into the atmospheric processor , he enforces Gorman 's orders not to use pulse rifle and smartgun ammunition .
Gunnery Sergeant Apone ( Al Matthews ) is the squad leader of the Colonial Marines sent to investigate LV - 426 .
During the first incursion into the atmospheric processor , Gunnery Sergeant Apone enforces Gorman 's orders not to use pulse rifle and smartgun ammunition .
Gunnery Sergeant Apone ( Al Matthews ) is the squad leader of the Colonial Marines sent to investigate LV - 426 .