SC3-9X42GDT is a variable power compact riflescope for use with military style modern sports rifles or small caliber hunting rifles. It has extended 4 inch eye relief that allows forward mounting on the receiver flat top for easier acquisition of a moving target. The scope is built with sniper MilDot reticle illuminated in Blue or Red light adjustable to 5 levels of lighting intensity. The scope also has a .223caliber BDC (Bullet-Drop-Compensator) dial on top the elevation adjustment knob. 1" one-piece body construction for better strength and more precise alignment. There is also a screw-on anti-reflection ARD killflash filter lens inlcuded with the scope that reduces glare off the objective lens. Other acessories included are front and back flip-open lens caps and weaver style scope rings of 31mm center height. Overall length: 9 3/4". Use one CR2032 button cell battery (included).