This bayonet was designed to fit the US M14 Automatic Rifle in 1957 and was mainly used during the Vietnam conflict. It is very similar to the US M5-A1 Bayonet with large push-button, but the M6 bayonet utilizes a muzzle-ring where the M5-A1 does not.

Blade is unmarked, but underneath the cross-guard is US M6, along with a maker's name.
Black plastic grips, iron mounting (steel), with steel Parkerized blade.

Scabbard is olive-drab fiberglass body with steel throat and drag. Throat is stamped USM8A1 over maker.