|Refurbished .50 cal Starter Set! Includes: Spyder Opus .50 Cal Marker, Loader, 250 Paintballs, Rubber Practice Paintballs, Barrel Cleaners, Barrel Plug and Spare Parts Kit. Plus, I&I Sports 90 Day Warranty and Unlimited Phone Tech Support! * I&I Sports Refurbished & Tested Mechanical .50 cal Opus with New Internals! * 10in Micro Honed One-Piece Barrel with Muzzle Break * Top Cocking Aluminum Bolt * Adjustable Clamping Feedneck * Steel Braid Hose & Bottomline * Operates on CO2 or Regulated HPA (NOT INCLUDED) NOTE: this is a 50 caliber marker; NOT 68 caliber!