Receiver system for a bolt action firearm, comprising: a receiver comprising a forward end adapted to receive a barrel and a rearward end arranged to receive a breech bolt in a boltway provided in said receiver; a breech bolt adapted to slide linearly in said boltway and to lock to said receiver by rotation when said breech bolt is in a closed position; a buttstock interface block attached at a rearward end of said receiver and adapted to interface with said stock; a trigger mechanism provided in said buttstock interface block and arranged to cooperate with a cocking piece 31 carried by a striker provided in said breech bolt.

Receiver system for a bolt action firearm, comprising: a receiver comprising a forward end adapted to receive a barrel and a rearward end arranged to receive a breech bolt in a boltway provided in said receiver; a breech bolt adapted to slide linearly in said boltway and to lock to said receiver by rotation when said breech bolt is in a closed position; a buttstock interface block attached at a rearward end of said receiver and adapted to interface with said stock; a trigger mechanism provided in said buttstock interface block and arranged to cooperate with a cocking piece 31 carried by a striker provided in said breech bolt.

Firearms and bolt mechanisms are disclosed herein. The firearm can include a bolt assembly configured to provide leverage for extracting a cartridge. The bolt body can include a main cylindrical body, handle, and a pivot pin extending through a portion of the handle within the cylindrical body. The handle can be rotated relative to the main cylindrical body to push the bolt assembly along an internal passageway of the receiver.

A bolt action rifle having a receiver; a bolt in slidable communication within said receiver, having an elongated body and a bolt head at a first end, and an exposed bolt face with a primer recess cavity having a base with a forward-facing surface, the base having an aperture therein, where the aperture is circumscribed by the forward-facing surface for receiving a propellant charge having an extended primer cap, and a firing pin within the bolt and movable between a disengaged position wherein a firing pin head is receded within the aperture and an engaged position wherein the firing pin head extends beyond the forward-facing surface into the primer recess cavity.

A bolt action rifle having a receiver; a bolt in slidable communication within said receiver, having an elongated body and a bolt head at a first end, and an exposed bolt face with a primer recess cavity having a base with a forward-facing surface, the base having an aperture therein, where the aperture is circumscribed by the forward-facing surface for receiving a propellant charge having an extended primer cap, and a firing pin within the bolt and movable between a disengaged position wherein a firing pin head is receded within the aperture and an engaged position wherein the firing pin head extends beyond the forward-facing surface into the primer recess cavity.

A break open rifle and bolt action rifle having a barrel extension with a breech end for receiving a propellant charge, a muzzle end with an extended attachment structure for receiving a complementary attachment structure of a barrel, and a chamber disposed within and through the barrel extension having a first diameter at a first end and a narrowing portion adjacent a second end opposite the first end, the narrowing portion having a second diameter smaller than the first diameter, wherein the first diameter of the chamber is sized to receive the propellant charge therein, and the second diameter of the narrowing portion is sized to prevent the propellant charge from being further inserted past the narrowing portion, and to prevent a projectile from being inserted through the chamber from the barrel muzzle end. A bolt action configuration having dual diameter non-rotating bolt with an extractor and ejector mechanism for removing a propellant charge.

A break open rifle and bolt action rifle having a barrel extension with a breech end for receiving a propellant charge, a muzzle end with an extended attachment structure for receiving a complementary attachment structure of a barrel, and a chamber disposed within and through the barrel extension having a first diameter at a first end and a narrowing portion adjacent a second end opposite the first end, the narrowing portion having a second diameter smaller than the first diameter, wherein the first diameter of the chamber is sized to receive the propellant charge therein, and the second diameter of the narrowing portion is sized to prevent the propellant charge from being further inserted past the narrowing portion, and to prevent a projectile from being inserted through the chamber from the barrel muzzle end. A bolt action configuration having dual diameter non-rotating bolt with an extractor and ejector mechanism for removing a propellant charge.

A compact shotgun, a trigger assembly that could be used with such compact shotgun or other firearms, and an adapter and multipurpose mount that could be used with firearms or other devices are all disclosed. Each element has separate utility and combined utility in forming a combined under-mounted shotgun and long gun assembly.

A compact shotgun, a trigger assembly that could be used with such compact shotgun or other firearms, and an adapter and multipurpose mount that could be used with firearms or other devices are all disclosed. Each element has separate utility and combined utility in forming a combined under-mounted shotgun and long gun assembly.

A break open rifle and bolt action rifle having a barrel extension with a breech end for receiving a propellant charge, a muzzle end with an extended attachment structure for receiving a complementary attachment structure of a barrel, and a chamber disposed within and through the barrel extension having a first diameter at a first end and a narrowing portion adjacent a second end opposite the first end, the narrowing portion having a second diameter smaller than the first diameter, wherein the first diameter of the chamber is sized to receive the propellant charge therein, and the second diameter of the narrowing portion is sized to prevent the propellant charge from being further inserted past the narrowing portion, and to prevent a projectile from being inserted through the chamber from the barrel muzzle end. A bolt action configuration having dual diameter non-rotating bolt with an extractor and ejector mechanism for removing a propellant charge.