Discovery VT-R 4-16x42 SFIRProduct Overview The Discovery Optics VT Z 4 16x42 SFIR redefines what value conscious shooters can expect from an entry level optic. Engineered specifically to meet the needs of rimfire enthusiasts and PCP airgun sportsmen, this riflescope packages high demand tactical features into a highly accessible, lightweight platform. Whether you are dialing in tight groups during benchrest plinking sessions or stalking small game at dawn, the VT Z delivers