The Sig Sauer Tango-MSR LPVO 1-6x24mm Riflescope features a high performance 6x optical system with low dispersion glass. Includes a Sig Sauer ALPHA-MSR 1 piece aluminum cantilever mount. Integrated thread in throw leaver that enables you to make quick magnification changes. Illuminated MSR BDC-6 reticle with 11x brightness levels. Also included are flip-back lens covers that lay flat when opened. The Sig Sauer Tango-MSR LPVO is a dependable waterproof, shockproof, and fog-proof rifle scope.