低速榴弹M583A1、M661、M662星光伞降信号弹这三种信号弹依次为白星、绿星和红星伞降信号弹,主要在夜间使用。它们的弹头壳体均由塑料制成,侧面为白色,弹尖处带有明显的颜色,其颜色与该弹种发出的星光颜色相同,并设有突出标记,便于射手夜间触摸识别。弹头弧形部采用“O”形密封圈连接在弹头壳体空腔前部的开口处,弹头壳体内容纳一铝罐。铝罐系在可旋转的降落伞下方,罐内装发光剂。连接体上螺接 Low grenades M583A1, M661, M662 Astral drop signals These three types of signal bombs, in turn, white, green and red satellite signal flares, mainly used at night. Their bullet shells are made of plastic with a white side and a clear color at the tip of the bullet, the color of which is the same as the color of the starlight emitted by the bullet and has prominent markings that allow the shooter to touch at night. The bullet arc is connected to the opening at the front of the cavity of the bullet shell by an “O” ring seal. The bullet shell houses an aluminum can. Aluminum cans are located below the rotatable parachute and contain potting luminaries. Connect the body screwed