NcStar's 3-Rail Sighting System is a new generation of modular tactical sighting systems. The unique mount encompasses a variable 2x-7x power 32mm scope. This housing allows the shooter to mount myriad different combinations of accessories directly to the scope for quick and easy access. Mount a secondary sight (red dot/reflex sight), laser targeting, and/or a tactical flashlight directly to the scope. A grand total of 16.75" rail space on the for a wide variety of accessories. Another benefit is this keeps the weight of the accessories closer to the center balance of the firearm, avoiding the front heavy barrel feel of all the accessories mounted at the front end of the barrel. Fits virtually any Weaver/Picatinny rail for max flexibility. Manufactured from aircraft quality anodized aluminum. Ideal for the shooter seeking a modular sighting system with easy attachment of accessories.