A firearm comprises a frame having a barrel and defining a passage registered with the barrel, with a bolt configured to reciprocate in the passage between a forward battery condition and a retracted condition. A latch that is movable between a retention position in which the bolt is prevented by the latch from moving from the retracted position to the battery position, and a release condition in which the bolt is prevented by the latch from moving from the retracted position to the battery position. The latch is biased to the retention position such that the bolt is retained in the retracted position after every shot; and an actuator connected to the latch and configured to move the latch to the release condition.

A firearm comprises a frame having a barrel and defining a passage registered with the barrel, with a bolt configured to reciprocate in the passage between a forward battery condition and a retracted condition. A latch that is movable between a retention position in which the bolt is prevented by the latch from moving from the retracted position to the battery position, and a release condition in which the bolt is prevented by the latch from moving from the retracted position to the battery position. The latch is biased to the retention position such that the bolt is retained in the retracted position after every shot; and an actuator connected to the latch and configured to move the latch to the release condition.

A breech for a straight-pull repeater rifle, comprising a breech box and a locking sleeve guided therein as well as a locking bar guided in the breech box and connected to the locking sleeve, the locking bar connects a bolt head to a bolt handle with a interposition of a chain link, wherein the chain link is linked in an articulated manner to the locking bar and the bolt handle, and the bolt handle can be swivelled between an open position and a closed position of the breech and interacts with a firing pin nut connected to a firing pin. A bolt head inserted into a breech sleeve at an end of the breech facing away from the bolt handle is provided. The locking sleeve and the locking bar are a one-part locking sleeve-bar and a locking spring pushing the chain link in the direction of its closed position is provided.

A method for operating a semi-automatic firearm as a single-shot firearm comprising: installing a bolt in the firearm, wherein the bolt comprises a bolt lock safety device, wherein the bolt lock safety device extends beyond a face of the bolt when engaged preventing the firearm from automatically reloading; when the bolt lock safety device is engaged, pulling a charging handle back to cause the bolt to move rearward exposing the firearm chamber to reload a cartridge, wherein the adjustable bolt lock is simultaneously rotated by the lock pivot pin to lay flush with the bolt forcing the bolt back into forward position; and upon release of the charging handle, automatically reengaging the adjustable bolt lock via a lock return spring causing the adjustable bolt lock to extend beyond the face of the bolt.

A method for operating a semi-automatic firearm as a single-shot firearm comprising: installing a bolt in the firearm, wherein the bolt comprises a bolt lock safety device, wherein the bolt lock safety device extends beyond a face of the bolt when engaged preventing the firearm from automatically reloading; when the bolt lock safety device is engaged, pulling a charging handle back to cause the bolt to move rearward exposing the firearm chamber to reload a cartridge, wherein the adjustable bolt lock is simultaneously rotated by the lock pivot pin to lay flush with the bolt forcing the bolt back into forward position; and upon release of the charging handle, automatically reengaging the adjustable bolt lock via a lock return spring causing the adjustable bolt lock to extend beyond the face of the bolt.

A firearm action has a receiver defining a bolt passage and having a latch engagement facility, a bolt assembly including a bolt body received in the passage and operable to reciprocate between a forward battery position and a rear open position, the bolt assembly including a bolt handle movable with respect to the body between a handle forward position and a handle rearward position, the bolt assembly including a bolt latch body having a latch element, the bolt latch body movable between a locked condition in which the latch element engages the latch engagement facility when the bolt assembly is in the forward position and the bolt handle is in the forward position to prevent reciprocation of the bolt, and an unlocked position in which the latch element is disengaged from the latch engagement facility to enable reciprocation of the bolt.

A firearm action has a receiver defining a bolt passage and having a latch engagement facility, a bolt assembly including a bolt body received in the passage and operable to reciprocate between a forward battery position and a rear open position, the bolt assembly including a bolt handle movable with respect to the body between a handle forward position and a handle rearward position, the bolt assembly including a bolt latch body having a latch element, the bolt latch body movable between a locked condition in which the latch element engages the latch engagement facility when the bolt assembly is in the forward position and the bolt handle is in the forward position to prevent reciprocation of the bolt, and an unlocked position in which the latch element is disengaged from the latch engagement facility to enable reciprocation of the bolt.

The invention relates to a bolt stop for an automatic firearm comprising a bolt stop lever that can be moved between a release position and a catch position, and a locking device that can be moved between a standby position and a locking position, for selectively securing the bolt stop lever in the release position, wherein the locking device is disengaged with the bolt stop lever when in the standby position, and is engaged in with the bolt stop lever when in the locking position, the bolt stop lever deactivated in the locking position.

The invention relates to a bolt stop for an automatic firearm comprising a bolt stop lever that can be moved between a release position and a catch position, and a locking device that can be moved between a standby position and a locking position, for selectively securing the bolt stop lever in the release position, wherein the locking device is disengaged with the bolt stop lever when in the standby position, and is engaged in with the bolt stop lever when in the locking position, the bolt stop lever deactivated in the locking position.

A firearm action has a receiver defining a bolt passage and having a latch engagement facility, a bolt assembly including a bolt body received in the passage and operable to reciprocate between a forward battery position and a rear open position, the bolt assembly including a bolt handle movable with respect to the body between a handle forward position and a handle rearward position, the bolt assembly including a bolt latch body having a latch element, the bolt latch body movable between a locked condition in which the latch element engages the latch engagement facility when the bolt assembly is in the forward position and the bolt handle is in the forward position to prevent reciprocation of the bolt, and an unlocked position in which the latch element is disengaged from the latch engagement facility to enable reciprocation of the bolt.