Sig Sauer Tango MSR rifle scope 1-10x28mm second focal plane 34mm maintube MSR-BDC10 illuminated MOA reticle black includes ALPHA-MSR cantilvered mount. Introducing the TANGO-MSR line of riflescopes by Sig Sauer. Featuring three new low power variable optics loaded with standard features and offered at an incredible value. These new models include illuminated reticles, factory installed flip-back lens covers, removable thread-in magnification throw levers and the impressive ALPHA-MSR cantilver mount.