众所周知,美国M16系列5.56毫米步枪不仅是美军制式突击步枪,还装备世界上55个国家和地区的军队及特种部队,成为现代突击步枪的标志性武器。然而,由于M16使用雷明顿5.56x45毫米小口径枪弹,所以初速高、枪管磨损快、机件碰撞剧烈,导致使用寿命短,可靠性差,而且其较远距 As we all know, the U.S. M16 series 5.56 mm rifles are not only US-style assault rifles, but are also equipped with the armed forces and special forces in 55 countries and regions in the world and become the emblem of modern assault rifles. However, since the M16 uses Remington 5.56x45 mm small-caliber bullets, the muzzle velocity is high, the barrel is worn fast, the impact of mechanical parts is severe, resulting in short service life and poor reliability,