ATHLON Helos BTR Gen2 HD, Rifle Scope, 2-12X Magnification, First Focal Plane, AHMR2 Reticle, 42mm Objective, 30mm Main Tube, Black 214104 The Helos BTR GEN2 2-12x42 is a versatile riflescope designed for both short and mid-range shooting needs. Featuring a robust 2-12x magnification range, providing precise aiming capabilities. The 42mm objective lens ensures excellent light transmission, resulting in bright, sharp images even in low-light conditions.