The Elcan SpecterOS4x Optical Sight model SVFOV4-C1 5.56 NATO is an optically brilliant instrument for precision aiming. With superior low light performance and extremely long eye relief, the SpecterOS4x outperforms competing 4x optical sights and, as a result, has been selected for general service by advanced military forces.

Depending upon the situation, the user may light the central part of the reticle with brilliant LED illumination for CQB applications, or select lower-level illumination of the entire reticle for low-light operations. Because the reticle is etched in glass, it is plainly visible even in the case of loss of electrical power due to battery failure or EMP.

The SpecterOS4x is an extremely rugged optical sighting.