The acog is internally-adjustable, compact telescopic sights with tritium illuminated reticle patterns for use in low light or at night.It combines traditional, precise distance marksmanship with close-in aiming speed.This model's design if 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.Includes a thumbscrew flattop adaptor, 4x32 scopecoat, lenspen, lanyard assembly for adjuster caps, trijicon logo sticker, acog manual and warranty card.Adj Size: 2 Clicks per Inch @ 100 ydsMagnification: 4xObjective: 32mmField Of View: 36.80 ft @ 100 ydsEye Relief: 1.50"Length: 5.80"Weight: 15.10 ozReticle: Illuminated Red Horseshoe w/ Red Dot 6.8 SPCParallax Adjustment: Dual Illuminated Green Horseshoe 6.8 BallisticProofs: Fog/Shock/WaterproofCoating Type: Waterproof, Fogproof, ShockproofOptic Coating: Multi-CoatedOptic Coating: Multi-Coated