Firearms

A firearm comprising a barrel, a bolt at one end of the barrel, means on the bolt mounting the bolt for axial displacement on the outside of the barrel to and from a firing position and for rotational movement on the barrel, spring means biasing the bolt towards the firing position, a carrier non-rotatably guided for axial displacement on the outside of the barrel, said spring means biasing said carrier to a forward position, means operatively connecting said means mounting the bolt to said carrier for axial displacement of the bolt by the carrier, and at least one locking element on the outside of the barrel for cooperation with said bolt in the firing position thereof, said connecting means guiding the bolt for rotation by axial displacement of the carrier to engage the bolt with the locking element after axial displacement to the firing position and to disengage the bolt from the locking element before axial displacement of the bolt from the firing position.