Trijicon TA01NSN-DOC ACOG 4x32 Advanced Combat Optical Gunsight combines the technology of the battle-tested Trijicon ACOG 4x32 Gun Sight with the Docter Optic Red Dot Sight. This provides shooters the option of quick acquisition close range sighting with the Docter Sight and the precision for longer range shooting with Trijicon ACOG 4x32mm Riflescope. Trijicon TA01NSN-DOC 4 x 32mm ACOG Advanced Combat Optical Gunsights hit fast in any light. Trijicon ACOG 4 x 32 Riflescopes are internally-adjustable, compact telescopic sights with tritium illuminated reticle patterns for use in low light or at night. Trijicon 4x32 ACOGs combine traditional, precise distance marksmanship with close-in aiming speed. Although Trijicon ACOG 4 x 32 Rifle Scopes TA01NSN & DOC have many features which are very advantageous for military use, they were developed by Trijicon without government funding. Designed for use with the M16 family, every feature of its mechanical and optical design was chosen for a single purpose: to provide increased hit potential in all lighting conditions - without failure-prone batteries. Trijicon TA01NSNDOC Rifle Scope Specifications: MAGNIFICATION: 4X OBJECTIVE SIZE: 32MM BULLET DROP COMPENSATOR: YES LENGTH (IN): 5.8 WEIGHT (OZ): 14.96 ILLUMINATION SOURCE: TRITIUM (NIGHT) RETICLE PATTERN: CROSSHAIR DAY RETICLE COLOR: BLACK NIGHT RETICLE COLOR: CENTER AMBER CALIBER CALIBRATION: .223 BINDON AIMING CONCEPT: YES EYE RELIEF (IN): 1.50 EXIT PUPIL (MM): 8.00 FIELD OF VIEW (DEG): 7.00 FIELD OF VIEW @ 100 YDS (FT): 36.80 ADJUSTMENT @ 100 YDS (CLICKS/IN): 3 TUBE SIZE: N/A MOUNT: TA51 Included (For Picatinny Rail)* MOUNT ON/COMES WITH: FLATTOP HOUSING MATERIAL: FORGED ALUMINUM