From Halopedia, the Halo wiki
A carbine is a shorter, often lighter, version of a full-sized rifle. When applied to pistols, it typically refers to a conversion kit applied to the pistol to offer some of the advantages of a rifle in a more compact form.
United Nations Space Command
This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same or a similar title. If an article link referred you here, you might want to go back and fix it to point directly to the intended page.