AIM Sports 1-4x24mm Tri-Illuminated First Focal Plane Scope Milled from one solid piece of aircraft grade aluminum to withstand constant heavy recoil. Tri-illuminated (Red, Green, Blue) Mil-Dot reticle with adjustable rheostat for brightness control. First focal plane, laser etched reticle is manufactured for long distance accuracy. Green fused multi-coated lens provides superior light transmission, resolution and scratch resistance. 4.2 Inch eye relief provides safety from heavy recoil and enables fast target acquisition.