noun
automatic rifle
A rifle that automatically reloads and fires continuously while the trigger is held. In military contexts, often distinguished from semi-automatic rifles.
その兵士は自動小銃を構えて前進した。
The soldier advanced, holding an automatic rifle at the ready.
Compound of 自動 (automatic) + 小銃 (rifle). The term is a straightforward modern coinage for 'automatic rifle'.