Answer: ejectors

AnswerCrossword Clue
EJECTORSGun parts
ejectorsdevice for inducing a flow of a fluid from a chamber or vessel by using the pressure of a jet of water, air, steam, etc., to create a partial vacuum in such a way as to entrain the fluid to be removed
ejectorsEJECTOR, one that ejects (to throw out)
ejectors(in a firearm or gun) the mechanism that after firing throws out the empty cartridge or shell
ejectorsperson or thing that ejects