Abstract: A gun sight mount used in association with a gun barrel, such gun sight mount positioned on a axially rotatable shaft member disposed at an acute angle to the axis of the gun barrel, offsetting such sight mount to a side of such gun barrel. A handle causes rotation of the shaft member and sight mount such that the sight mount moves from a position where its axis is parallel to the axis of the gun barrel to a position where its axis is pointing downward and outward from the direction of the axis of the gun barrel to a point selected for the desired range whence the sight is then aimed at the target which action then elevates the gun barrel for the correct range and offsets the gun barrel from the target to adjust for the projectile's drift in order to aim the projectile accurately to hit the target.

Abstract: An improved alignment guide for use in the MK-19 grenade launcher of the type having a body member with a centrally located slot defined therein extending to a bowl formed in the body member, the guide being characterized by a lack of upper and lower edge rails and having a single body aperture formed therein between its central screw aperture and the bowl, the body member around the bowl being approximately 0.25 inch thick with a thickened arm provided at the end of the body member beyond the bowl, such thickened arm being approximately 0.5 inch thick, such alignment guide having the same interface dimensions as that of the prior art alignment guide to allow the alignment guide of this invention to be engaged into the receiver of an MK-19 grenade launcher.

Abstract: A safety lever pin for insertion into a safety lever pin receipt aperture of the sear assembly of an MK-19 grenade launcher such pin having a machined cylindrical body with an arm extending from the top thereof and structure to retain the safety lever pin within the safety lever pin receipt aperture to prevent its inadvertent falling out therefrom when the sear assembly is removed from the weapon and inverted.

Abstract: A socket wrench comprises a ratchet head which is removably held in an aperture in the forward end of a ratchet handle. A knurled drive ring allows the ratchet head to be used when detached from the handle and the handle itself is hollow and receives a tray which is dimensioned to hold a plurality of sockets. Access to the sockets is obtained by withdrawing the tray from the handle.