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在半自动、自动步枪,冲锋枪附件中,有一个小附件,名叫瓦斯铰刀。由于它个头小,再加上三支枪配备一个,所以,往往容易被人忽视,甚至有的同志见到它连其名字都不知道呢。现在轻武器的自动,多数是采用导气式的自动原理。就是利用导气箍从枪膛内引出部分火药气体,推动活塞杆传动使枪机完成子弹进膛,击发,退壳等一系列动作,使武器实现自动。当火药气体通过导气箍的导气孔时,火药气体的残渣会附着在孔壁上,使得导气孔减小,如果不把它及时擦拭干净,在今后的射击中,就会因流入气室
In the semi-automatic, automatic rifle, submachine gun attachment, there is a small attachment, called gas reamer. Because of its small size, coupled with three guns equipped with one, it is often easily overlooked, and even some comrades saw it without even knowing its name. Now automatic light weapons, most of them adopt the principle of automatic gas. That is, the use of gas hoop leads from the gunpowder part of the gunpowder gas to promote the piston rod drive to complete the bullets into the chamber, firing, shell and a series of actions to make the weapon automatically. When the gunpowder gas through the gas guide hoop gas hole, the gunpowder gas residue will be attached to the hole wall, making the air hole reduced, if not wipe it in a timely manner in the future shots, it will flow into the gas chamber