Abstract

A medium caliber round of ammunition capable of being fired at variable velocities and trajectories, and methods of firing such, are presented herein. The ammunition round includes a grenade and a cartridge received in a firing chamber. The cartridge has a front case for receiving the grenade, and a rear case for receiving a primer. An adjustable variator collar is disposed between the front and rear cases. The variator collar is adjustable between a first position that chokes the venting of gas from a high-side stage to a low-side stage for low muzzle velocity, and a second position for un-choking the venting of gas from the high-side stage to the low-side stage for a rapid rise in pressure during the low-side stage, resulting in a high muzzle velocity. The collar may further be adjusted in any position between the first and second for relative amounts of controlled fluid flow.

IPC Classes  ?

• F42B 5/02 - Cartridges, i.e. cases with propellant charge and missile
• F42B 30/04 - Rifle grenades
• F42B 8/18 - Rifle grenades

Abstract

A rifle comprises a quad lock multicaliber receiver, a barrel extension, a bolt, and a projection engageable with the receiver. The barrel extension includes a cartridge chamber and is securable in an end of the receiver. The bolt is slideable in the receiver and engages a cartridge in the cartridge chamber during the firing phase. The projection comprises locking bars extending through the receiver, and is moveable between locked and unlocked positions to allow for securing and removing of the barrel extension, respectively. Positioning bars are disposed on either side of the receiver split parallel to its longitudinal axis. The locking bars are disposed between these positioning bars and the barrel extension such that when the positioning bars are urged toward each other the receiver split is closed and the positioning bars urge the locking bars toward and into locking grooves to secure the barrel extension in the receiver.

IPC Classes  ?

• F41A 21/48 - Barrel mounting means, e.g. releasable mountings for replaceable barrels
• F41A 21/10 - Insert barrels, i.e. barrels for firing reduced calibre ammunition and being mounted within the normal barrels
• F41A 11/02 - Modular concepts, e.g. weapon-family concepts
• F41A 21/12 - Cartridge chambersChamber liners

Abstract

A rifle comprises a quad lock multicaliber receiver, a barrel extension, a bolt, and a projection engageable with the receiver. The barrel extension includes a cartridge chamber and is securable in an end of the receiver. The bolt is slideable in the receiver and engages a cartridge in the cartridge chamber during the firing phase. The projection comprises locking bars extending through the receiver, and is moveable between locked and unlocked positions to allow for securing and removing of the barrel extension, respectively. Positioning bars are disposed on either side of the receiver split parallel to its longitudinal axis. The locking bars are disposed between these positioning bars and the barrel extension such that when the positioning bars are urged toward each other the receiver split is closed and the positioning bars urge the locking bars toward and into locking grooves to secure the barrel extension in the receiver.

IPC Classes  ?

• F41A 21/48 - Barrel mounting means, e.g. releasable mountings for replaceable barrels
• F41A 21/10 - Insert barrels, i.e. barrels for firing reduced calibre ammunition and being mounted within the normal barrels
• F41A 11/02 - Modular concepts, e.g. weapon-family concepts
• F41A 21/12 - Cartridge chambersChamber liners

Abstract

A rifle has a receiver, a cartridge chamber connected to the receiver, and a bolt slideable longitudinally in the receiver, the bolt is engageable with a cartridge in the chamber. A bolt carrier is slideable longitudinally in the receiver to move the bolt into and out of engagement with a cartridge in the cartridge chamber, and a bolt handle is connected to the bolt carrier. The bolt handle is positionable in a manual position extending from one side of the rifle to permit manual firing of the rifle and in a semiautomatic position about 180 degrees different from the manual position and extending from the other side of the rifle to permit semiautomatic firing of the rifle. The position of the bolt carrier may be changed between the manual and semiautomatic positions without removing the bolt carrier from the rifle.

IPC Classes  ?

• F41A 3/00 - Breech mechanism, e.g. locks
• F41A 3/14 - Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively
• F41A 3/66 - Breech housings or framesReceivers
• F41A 3/36 - Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrrel or breech housing
• F41A 3/72 - Operating handles or leversMounting thereof in breech-blocks or bolts