US Patent 10119781 Grenade launcher and pivot mechanism for same

A grenade launcher is provided comprising a chassis, a barrel assembly, and a pivot mechanism. The pivot mechanism comprises a first pivot bar on the barrel assembly extending transversely. The first pivot bar has a first hinge barrel disposed at one transverse end thereof and is attachable in a first orientation wherein the first hinge barrel is on a left side of the barrel assembly and a second orientation wherein the first hinge barrel is on a right side of the barrel assembly. A second pivot bar is disposed on the chassis and has a second hinge barrel disposed at one transverse end thereof. The second pivot bar is attachable in a first orientation wherein the second hinge barrel is on a left side of the barrel assembly and a second orientation wherein the second hinge barrel is on a right side of the barrel assembly. A pivot pin extends in vertical openings in the first and second hinge barrels and defines a pivot axis for pivoting movement of the barrel assembly between a closed position and either a left or a right open position.