The TenPoint Siege RS410 ACUslide RangeMaster Pro Crossbow Package is compact made comfortable. Its micro-trac barrel reduces string-to-rail contact by an incredible 50%. This leads to increased accuracy and provides string life in excess of 1000 shots. Its has an adjustable butt plate provides 1-inch length of pull adjustment. The RangeMaster 100 Scope features multi-coated glass for optimal light gathering. The variable speed scope includes lighted aiming points for precision down-range accuracy.