Sig Sauer TANGO MSR Compact, Rifle Scope, 1-6X Magnification, Second Focal Plane, Illuminated BDC 6 Reticle, 24mm Objective, 30mm Main Tube, Black, Includes ALPHA MSR 1.535 Mount SOTMC61000 The TANGO-MSR with high-magnification models includes factory installed MSR mounts for quick and easy setup.