The Vortex SPARC AR red dot sight is purpose built for your semi-auto platform. It is durable, lightweight, compact and fast. It features a forward facing battery compartment and rear facing controls for increasing or decreasing the intensity of the 2MOA red dot. The SPARC is parallax free and has unlimited eye relief. It is fogproof, waterproof and shockproof. With this red dot you will receive the optic that your rifle deserves. Specifications: Vortex SPARC AR Red Dot (2 MOA Bright Red Dot) SPC-AR1