U.S.-U.K.-Japan 81mm Mortars (L16 & M252) Live Fire – 日米英の81mm迫撃砲 (L16 & M252) 実弾射撃 US Army and US Marines to fire an M252 81mm mortar, and Royal Marines and Japan Ground Self-Defense Force to fire an L61 81mm mortar. Click here to Subscribe USA …