The Uzi has a few modes of fire: Protected, SEMI, and AUTO. It fires from an open bolt; In case the bolt is closed about the chamber, the weapon won't fire. Such as the M1911, it incorporates a grip security, which must be frustrated before the weapon could be fired. https://simonidtix.dm-blog.com/31058621/how-glock-g19x-can-save-you-time-stress-and-money