Features: � Tournament legal external velocity adjuster � Removable grip frame for quick and easy upgrades � Easily accepts expansion chambers, vertical and horizontal bottle adapters � Works with CO2 or Compressed air � Tactical collapsible car stock. (Optional not included) � Stainless steel bottom line � Impact resistant baked on coating � Dual Pica tinny mounting rails meet Military Standard 1913 � Modular trigger system � 1 year full parts and labor warranty � Slide-Away Feed port for easy cleaning, maintenance - Offset for aim and accuracy � Lightweight balanced construction � Adjustable vertical front grip � Selecta-Barrel adapter allows use of multiple barrel threads