It is the bolt carrier with the help of which theAr 15 is controlled when firing and feeding it. Further, it helps in the removal of ammunition from the ar15. The Bolt carrier group holds the components bolt, firing pin, extractor, and ejector of ar15.
• The charging handle – A handle used to charge the AR 15 is referred the charging handle. It is similar to a hand gun slide. This charging handle is fixed and does not come into motion while firing. The main use of the handle is to fix a malfunction or for loading the chamber for a new round.
• The function of forwarding assist: Forward assist finds its utilization when a bolt needs to be closed completely and it gets stuck midway. Some users prefer eliminating these ar 15 parts as they think it does not have an important function as such and also finds the look boring. The forward assist is installed over the AR 15 receiver.
• Cover for the ejection port –This cover is used to protect the bolt carrier group from dirt, dust and similar substances. The port either stays opened or closed and the most interesting fact about it is that it opens automatically but needs to be closed manually. There are few models where this ejection port cover is not present but it can be implemented later.
• Flash brake –They are used to help with recoil and muzzle brake and are present at the backend of the barrel. They are available in various styles.
The Ar 15’s lower receiver is a complete gun by itself. Hence a person who wants to possess this must follow some special rules like having a unique and important paperwork. There are special procedures to possess a rifle in every country as well as the state.