The Insight M2124 is a rugged, clip-on night vision device (CNVD) based upon the military nomenclature AN/PVS-24/A, and designed for use with 3-10X magnified day optics. Enables long-range target identification and engagement at night. The advanced design of the M2124 eliminates the typical requirement of removing a primary (day) sighting system since the CNVD mounts in line with a standard day optical sight. Combining day and night vision sights eliminates the need to re-zero, since the primary sight remains undisturbed. Additional advantages to supplementing a primary sighting system with the M2124 include maintaining a users consistent eye relief and shooting position as well as retaining user muscle memory. By operating the locking quick-disconnect, single-throw lever mounting system provided, the M2124 easily attaches to a MIL-STD-1913 rail interface system. The unit may also be used as a hand-held observation device. The only night vision tube that meets US Mil-Standard A10F or A10G.