Detachable tube magazine for a firearm

Abstract

Magazine tube containing cartridges that is detachable from the firearm. The set consists of a receiver base for the magazine tube. The rear end is screw shaped for attaching to the receiver frame of the firearm, the other end has a mechanism to lock the magazine tube in place by means of spring loaded catch. The magazine tube contains cartridge feeding spring with stop collar. The magazine tube mouth has tapered collar that blocks the cartridge from ejecting unless the collar is pressed into the receiver base.

1 . Detachable magazine tube for a firearm, consisting of: 
 Receiver base ( 1 ) for magazine tube whose one end is an opening for inserting the magazine tube ( 2 ), the other end being attached to the opening ( 20 ) of the receiver frame ( 17 ) by means of mechanical lock.    Magazine tube ( 2 ) as a tube for inserting into the receiver base ( 1 ), the tube having cartridge feeding spring ( 6 ) inside the tube ( 2 ) at which the tube mouth has a cartridge releasing mechanism ( 7 ). The other end of the magazine tube is blocked to hold cartridge inside. Screw groove ( 8 ) is machined to the external surface of the magazine tube ( 2 ) to provide distance adjustment for the adjustment ring ( 9 ).    Characterized in that:    At one end of the receiver base ( 1 ) is a holding mechanism ( 4 ) for adjustment ring ( 9 ) of the magazine tube ( 2 ) by means of mechanical lock that is removable. Inside of this device is split-tube ( 5 ) to hold the installation ring ( 24 ) of the barrel ( 22 ).    The magazine tube ( 2 ) has external coil spring ( 10 ) installed to assist ejection of the magazine tube ( 2 ) when released from the receiver base holding mechanism ( 4 ).    Holding mechanism ( 7 ) consists of lock-tube ( 11 ) that is inserted inside the external tube ( 12 ), The tube has one end that is attached to one end of the magazine tube ( 2 ) by means of mechanical lock and the other end of the lock-tube ( 11 ) is a number of finger-locks ( 14 ) that has slight curvature to hold and prevent cartridge from ejecting from the magazine tube ( 2 ) while the external tube ( 12 ) is pressed with tube-spring ( 15 ) to hold against finger-lock ( 14 ) and the inside of the lock-tube ( 11 ) has a push rod ( 16 ) that is meant to send the next cartridge into the receiver base ( 1 ).    
     
     
         2 . Detachable magazine tube for a firearm according to  claim 1 , having a split-tube ( 5 ) that can be split in to parts and re-assemble to form a tube when installed inside the holding mechanism ( 4 ).  
     
     
         3 . Detachable magazine tube for a firearm according to  claim 1 , having a receiver base ( 1 ) that is placed inside the channel ( 18 ) of the fore-end grip ( 19 ).  
     
     
         4 . Detachable magazine tube for a firearm according to any one of claims  1 - 3 , in which the barrel ( 22 ) attached to the receiver frame ( 17 ) has long dimension.  
     
     
         5 . Detachable magazine tube for a firearm according to any one of claims  1 - 4 , in which the barrel ( 22 ) attached to the receiver frame ( 17 ) has short dimension.