主题：【军事科普】9。土共履带步兵战车（一） -- szbd

里面没写，当时忘了

his round was introduced in the late 1970s and is used in the 2A42 cannon fixed to the BMP-2 and in movable mounts on Ka-50 and Mi-8 helicopters with double ammunition supply and a selective fire rate of 200 and 600rpm. The 2A42 is a gas/recoil operated cannon weighting 115kg and measuring 3030mm in length.

The 2A72 cannon, installed in the BMP-3 is recoil operated and has a fixed fire rate of 330rpm, the cannon weights 84kg and is 3010mm long.

2A72就是2A42减少和改动几个零件来的。