The term FIREARM MECHANISM can be broken down into two solutions: EJECTOR (7 letters) and GUNLOCK (7 letters). An ejector is a mechanical device that is used to remove spent cartridges from a firearm after it has been fired. A gunlock is a safety device that prevents a firearm from being fired until the lock is disengaged. Both of these mechanisms are important components of firearms, as they help ensure the safety of the user and those around them.