View targets with a vivid clarity and 4x-20x magnification when you look through a ZeroTech Vengeance 4-20x50 Rifle Scope. ZeroTech designed these Rifle Scopes with Pop-Lok turrets with true 0.25MOA adjustment travel, and the aircraft grade altitude adjustment eliminates any concern about your zero changing while on the spot. The ZeroTech Vengeance 4-20x50 Rifle Scope has superior light transmission, thanks in part to the 4x to 20x variable zoom system.