The M4 Close Quarters Weapon is a combat melee weapon used by the UNSC. The blade is designed for small size and concealability. It uses a hand made tanto blade, chiselled, ground, and buffed by its creator and zero ground, to avoid a second bevel, minimizing drag in cutting. The blade is attached to a folding handle with a walker linerlock, made of titanium, along with a titanium double inner lining, with a ambidextrous moulded grip built onto it. The weapon comes in phosphate covering, exposed edge phosphate coat or coatless.