Patent ID: 9188404
Filing Date: 2015-11-17
Classification: F41A

Abstract:
1. A projectile-firing weapon comprising: a smoothbore precision barrel having a circular inner barrel cross-section and a muzzle at one barrel end; a metal toothed rail positioned along an upper inner surface of the barrel, said rail extending (i) along a length of a bore of the barrel and (ii) into the bore of the barrel a specific distance so that the teeth of the rail engage with and indent a leading edge and circumference of a projectile traveling along the barrel so as to impart a specific rate of upward spin on the projectile as it the projectile exits the muzzle of the weapon; and wherein said smoothbore precision barrel further comprises (i) a slot extending through and along a sidewall of said barrel from an outer surface of said barrel to said bore, said slot being sized to accept at least a portion of said metal toothed rail therein, and (ii) one or more channels extending through said sidewall from a first location along said outer surface on one side of said slot through said slot to a second location along said outer surface on an opposite side of said slot.