M1A1 機動性略差 , 停車比較麻煩 . 摩托車要加掛被動式高爆裝甲 , 裝甲塊遭受撞擊之後會爆開把來襲彈藥擊偏 . 不然加裝被動式噴流裝甲 , 撞擊之後會射出一道高溫超音速金屬噴流把來襲彈藥擊穿 . 不然後座參照 B-52 配置自動砲塔 , 自動把 RPG 射向來襲敵車 .

http://en.wikipedia.org/wiki/Image:B52_tail_turret.jpg
http://en.wikipedia.org/wiki/B-52_Stratofortress
The B-52A through F carried a tail-mounted armament of four .50 caliber (12.7 mm) machine guns with the gunner sitting in the tail which would prove effective against MiGs in Vietnam. The B-52G moved the gunner up front and controlled the guns by remote. The B-52H used the single 20 mm M61A1 Vulcan used by many USAF fighters.

http://www.atomicmuseum.com/tour/ds2.cfm
One M-61 20mm gun in General Electric rear turret with Emerson ASG-21 automatic fire control system.

我是來打屁的 . 不過怎麼看都是全罩式安全帽便宜 !