3-Ten Corporation
3-Ten Corporation, based in Feeding Hills, Massachusetts, the inventing company and manufacturer of "bulleted shotshells," produces a combat weapon and ammunition ensemble that is designed specifically to increase combat lethality and versatility, satisfying increasing demands of military Special Operations Forces and elite civilian law enforcement teams. 

3-Ten Corporation's weapons system combines the advantages of the rifle, carbine, pistol, shotgun, and machine pistol in a single weapon.  The weapon is light-weight, low-recoil, easily mastered by the user, easily maintained, ruggedized for military use, readily fitted with a sound suppressor, and will not malfunction when exposed to harsh environments, including continued exposure to desert sand or prolonged exposure to salt water. 

The 3-Ten Carbine is chambered for the .45 Winchester Magnum round, and fires three varieties of ammunition.

3-Ten Corporation also produces bulleted shotshell ammunition in a variety of chamberings, including 9mm Parabellum, .44 Magnum, .45 ACP, and .38 Special.

Chamberings are now being considered for .50 B
MG and 20 x 102mm (Phalanx).