A barrel breech lock and mechanism for a projectile launcher chat uses a launcher body, a lower rail extending forward and under the launcher's barrel breech and a pivotally mounted latch plate. Extending downward extending from the latch plate is a front handgrip. Disposed between the lower rail and the latch plate and directly above the front handgrip is a locking mechanism that selectively blocks rotation of the proximal end of the latch plate. In two embodiments, the locking mechanism is a biased lateral push button or a biased sliding button. When the lock mechanism is activated, the proximal end of the latch plate may be rotated downward by a twisting force applied via the from handgrip. Disposed between the proximal end of the latch plate and the barrel breech is a second lock mechanism that includes a pin. The end of the pin engages a stop surface formed on the barrel breech when axially aligned in the breech void area. The first lock mechanism can be easily activated with the hand holding the from handgrip. Because the first and second lock mechanisms must be sequentially activated in order to open the barrel breech, the operation of the projective launcher is safer.

Disclosed is a grenade launcher that can be loaded and unloaded from both sides, prevents sag during these loading/unloading, fully covers the ammunition so that shooters are safe while shooting and avoids potential drop of ammunition when loading.

Disclosed is a grenade launcher that can be loaded and unloaded from both sides, prevents sag during these loading/unloading, fully covers the ammunition so that shooters are safe while shooting and avoids potential drop of ammunition when loading.

A grenade launcher system comprises a grenade launcher receiver and a grenade launcher barrel attached to the grenade launcher receiver. A trigger assembly is attached to the grenade launcher receiver at a position adjacent the grenade launcher barrel. The grenade launcher receiver has an elongate channel disposed on an upper surface of the grenade launcher receiver, the elongate channel extending parallel to the grenade launcher barrel and configured to slidably and removably receive a mounting rail. In certain embodiments, the grenade launcher system is configured to operate in an underslung configuration relative to a firearm. In certain embodiments, the grenade launcher system is configured to operate in a standalone configuration without a firearm.

A test fixture for testing firearms or ammunition includes a base, a block, and a firing pin. The base has a lateral channel defining a front upright and a rear upright. The front upright is configured to support a firearm barrel. The block is rotatable within the lateral channel between an open position and a closed position. The open position provides user access to the firearm barrel. The firing pin is housed in the block. The closed position of the block aligns the firing pin with the firearm barrel.

A grenade launcher system comprises a grenade launcher receiver and a grenade launcher barrel attached to the grenade launcher receiver. A trigger assembly is attached to the grenade launcher receiver at a position adjacent the grenade launcher barrel. The grenade launcher receiver has an elongate channel disposed on an upper surface of the grenade launcher receiver, the elongate channel extending parallel to the grenade launcher barrel and configured to slidably and removably receive a mounting rail. In certain embodiments, the grenade launcher system is configured to operate in an underslung configuration relative to a firearm. In certain embodiments, the grenade launcher system is configured to operate in a standalone configuration without a firearm.

A firearm and a jig for modifying or constructing a firearm with a locking magazine release button is provided. The firearm has a lower receiver including a magazine locking pin aperture disposed in an upper surface thereof where the magazine locking aperture intersects with a magazine release button aperture in a side surface of the lower receiver. The firearm also has an upper receiver attached to the lower receiver via a pivot pin, a magazine attachable to the lower receiver, a magazine locking pin inserted into the magazine locking pin aperture, and a magazine release button comprising a recessed locking catch. The magazine release button releases the magazine when the upper receiver is away from the lower and the pin is not in the magazine locking aperture. The button is inoperable when the upper receiver is next to the lower receiver and the pin engages the locking catch.

Embodiments of the present invention include a breech system comprising, first, a breech lock with a pivotable cam end plate for accessing a firearm breech and, second, a camming cartridge extractor with a pivotable lever for extracting a fired cartridge. The pivotable cam end plate may be connected to an independently pivotable arm that is operable as a lever for moving the cam end plate into an open position to allow breech access. The pivotable cam end plate and pivotable arm may be capable of a plurality of movements within the same plane in order to optimize leverage and cam action for opening the breech lock.

Embodiments of the present invention include a breech system comprising, first, a breech lock with a pivotable cam end plate for accessing a firearm breech and, second, a camming cartridge extractor with a pivotable lever for extracting a fired cartridge. The pivotable cam end plate may be connected to an independently pivotable arm that is operable as a lever for moving the cam end plate into an open position to allow breech access. The pivotable cam end plate and pivotable arm may be capable of a plurality of movements within the same plane in order to optimize leverage and cam action for opening the breech lock.

Embodiments of the present invention include a breech system comprising, first, a breech lock with a pivotable cam end plate for accessing a firearm breech and, second, a camming cartridge extractor with a pivotable lever for extracting a fired cartridge. The pivotable cam end plate may be connected to an independently pivotable arm that is operable as a lever for moving the cam end plate into an open position to allow breech access. The pivotable cam end plate and pivotable arm may be capable of a plurality of movements within the same plane in order to optimize leverage and cam action for opening the breech lock.