Bayonet Lug

Bay·o·net Lug

(bā′ə-nĕt′, bā′ə-nĭt, -nĕt′ (lŭg)

A mounting point on a small arm that allows a bayonet or other accessory to be attached. A bayonet lug is a standard feature on most military muskets, rifles, and shotguns, and on some civilian longarms. It is intended for attaching a bayonet, which is typically a long spike or thrusting knife. The bayonet lug is the metal mount that either locks the bayonet onto the weapon or provides a base for the bayonet to rest against, so that when a bayonet thrust is made, the bayonet does not move or slip backwards.

Bayonet Lug
Bayonet Lug