Gas Powered Gun Barrel

Abstract

An improved barrel system for gas powered guns that improves the performance of the guns, by employing adjustable inserts in slots in the barrel to provide an effective barrel diameter less than the bore diameter. The barrel system may optionally include barrel liners, inserts and spin-control components.

1 . A barrel system for gas powered guns comprising a hollow cylindrical barrel having a plurality of longitudinal slots spaced around the circumference of the cylindrical barrel and inserts, portions of which that fit into the slots and extend through the barrel wall and beyond the surface of the inside wall of the barrel. 
     
     
         2 . The system of  claim 1  wherein the inserts are constructed to snap fit into slots constructed to accommodate snap-fit inserts. 
     
     
         3 . The system of  claim 1  wherein the inserts have a bottom cross section selected from the group consisting of flat, concave, convex, pointed, dual and curved. 
     
     
         4 . The system of  claim 1  wherein the inserts are, at least partially, constructed of a flexible material. 
     
     
         5 . The system of  claim 1  wherein there are at least two sets of slots spaced around the circumference of the cylindrical barrel, one offset from the other and spaced longitudinally on the barrel so that each slot in each set partially longitudinally overlaps a slot in the next adjoining set and is spaced apart from the slots of a second set; or the slots are spaced without overlap but with inserts configured to have a portion of the insert extend beyond the barrel surface inside the barrel so that inserts longitudinally overlap. 
     
     
         6 . The system of  claim 1  wherein the slot opening and the inserts are structured to allow the insert to be fitted into the slot opening so that the inserts fit into the slots and the top surface of the insert(s) is positioned even with or extends slightly above the surface of the outside circumference of the barrel. 
     
     
         7 . The system of  claim 1  wherein the barrel as a single piece or combined sections of barrel has a proximal end and a distal end and wherein the proximal end has an adapter that is adapted to mate with and connect to the breech connection of a gas powered gun. 
     
     
         8 . The system of  claim 1  also comprising a means for holding the inserts in place when the system is in use. 
     
     
         9 . The system of  claim 8  wherein the means is a cover. 
     
     
         10 . The system of  claim 1  wherein the barrel comprises at least two sections, a proximal end section and a distal end section, that can be connected together to form a single slotted barrel. 
     
     
         11 . The system of  claim 1  also comprising a slotted inner liner to be placed inside the bore of the barrel, wherein slots in the liner match and communicate with the slots in the barrel. 
     
     
         12 . The system of  claim 7  wherein there is a removable liner that fits inside the adapter inside bore. 
     
     
         13 . The system of  claim 12  wherein the 1 adapter is slotted and the liner grooved so that when assembled there are ridges inside the barrel for a projectile to ride upon. 
     
     
         14 . The system of  claim 1  comprising means for inducing spin on a projectile located on or attached to the distal end of the barrel. 
     
     
         15 . The system of  claim 14  wherein the distal end section has a cover and slideable wedge that engages a strip disposed on top of an insert that can flex downward to move an insert further into the bore of the barrel thereby exerting increased friction on a projectile in flight to cause it to spin. 
     
     
         16 . The system of  claim 14  comprising housing for inserts located inside a cylindrical spin attachment attached to the distal end of the barrel and means to position the inserts into a portion of the bore of the barrel to contact a projectile passing through the attachment. 
     
     
         17 . A barrel system for gas powered guns comprising a hollow cylindrical barrel having narrow, shaped ridges disposed on the inside of the barrel or on the inside of a barrel liner, spaced around the circumference of the cylindrical barrel or liner. 
     
     
         18 . The barrel system of  17  wherein the ridges are malleable.