If it's speed, accuracy and deeper strikes you want, the black Custom Pro™ Marker with E-Trigger™ will surely help you make your mark. It comes standard with upgrades such as an 11-inch high-performance stone-honed barrel for better accuracy, a double-trigger for better control and faster firing and a drop forward. It also features electronics with five firing modes (semi-auto, auto-response, full auto, 3-shot bursts, turbo) for rapid variable firing up to 17 balls per second. The Custom Pro also has the ability to accept the Flatline™ Barrel System, Sniper barrels, collapsible stock, rear-cocking system, vertical adapter kit, vertical and expansion chamber kit and the low pressure system. The Tippmann Custom Pro Basic Features: *ACT (Anti-Chop Technology) *11" Quick Thread High Performance Stone-Honed Barrel *Semi-Automatic, .68 Caliber *Quick Release Feeder Elbow *Hypershot Trigger System with Under 3lb Trigger Pull *Double Trigger System for Faster Firing *Drop Forward *Aluminum Die Cast Receiver *Fully Customizable to Enhance Performance *Heavy Duty Stainless Steel Braided Gas Line *Removable Front Grip to Accept Expansion Chambers and Vertical Tanks *200 Round Hopper (Included) *Fully Compatible for CO2, Compressed Air or Nitrogen *Includes Maintenance Pack (Allen Wrench Set, Spare Tank O-Ring, Marker Lubricant, Cleaning Cable, Barrel Sleeve)