Compact & Lightweight: Weighing less than 1 ounce, the FastFire C won't affect firearm balance or handling. The frame is built from advanced composite polymers for ultimate reliability and recoil resistance; Bright Red 6 MOA Aiming Dot: The 6 MOA aiming dot is ideal for everyday carry pistols and allows for fast target acquisition and easy aiming; Windage & Elevation Ajustments: Fine-tune your point of aim with 80 MOA worth of elevation and windage adjustments, requiring no special tools. Also includes a 1deg (60MOA) shim for additional elevation adjustment if needed; 1x Magnification: The virtually parallax-free, FastFire C allows for both-eyes-open shooting for enhanced awareness and better accuracy; Burris Intelligent Auto-Bright: Always keeps the optic on and ready for anything, no matter the lighting conditions. This system utilizes changes in light to determine if the optic is in use or being stored. Superior to shake awake; Removable Rear Fixed Sight: Includes an optional rear post sight (designed to be used in conjunction with the original front iron sight). You can install or remove the rear post sight using the same mounting screws used to mount the optic