Trijicon NB ACOG 4x32mm wTA51 Mnt BAC Grn Crossh
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Advanced Combat Optical Gunsight includes TA51 flattop adapter. Features dual illumination; Fiber optics provides daylight illumination and tritium illuminates reticle at night. Fixed power, compact design, built for use in bright to low/no light. Waterproofing to 328 feet. Both eyes open design.