5.56毫米口徑子彈與7.62毫米口徑子彈，二者孰強孰弱？美國M16的M193彈與俄羅斯的AK47所使用M43彈，又有什麼區別？

對子彈而言，無論口徑多大、作用是什麼，它都是由彈丸、藥筒（彈殼）、發射藥和火帽（底火）四個部分構成的。當發射時，擊針激發火帽，底火迅速燃燒引燃彈殼內的發射藥，發射藥產生瞬燃同時產生高溫和高壓將彈頭從彈殼內擠出，此時彈頭在發射藥產生的高壓推動下 向前移動，受到膛線的擠壓產生旋轉，最終被推出彈膛。 For bullets, no matter how big the caliber is and what the function is, it is composed of four parts: projectile, cartridge (casing), propellant and flash cap (primer). When firing, the firing pin activates the flash cap, the primer rapidly burns and ignites the propellant in the cartridge case, and the propellant generates instantaneous combustion and generates high temperature and high pressure to extrude the warhead from the cartridge case. At this time, the warhead is driven by the high pressure generated by the propellant. Moves forward, is squeezed by the rifling to generate rotation, and is finally pushed out of the chamber. #火力就是正義#M193彈#M43彈