Patent ID: 8104218

Claim:
A firearm accessory mounting rail with an integrated back up sight system, comprising: an elongated Picatinny rail having longitudinally spaced apart first and second ends and a transverse profile; first and second sight elements longitudinally spaced apart, the first sight element having a visual marker substantially centrally laterally positioned and the second sight element having laterally spaced apart visual markers at least one of the sight elements being defined substantially completely within the transverse profile of the rail while in use; a substantially centered longitudinal channel on an upper surface of the rail extending between the first and second sight elements; whereby a firearm may be sighted by visually aligning the marker of the first sight element between the markers of the second sight element, such that, in use, visual alignment of the sight elements is at least partially through the longitudinal channel and substantially completely within the transverse profile of the rail.