Features:

• .68 caliber system.
• Semi-automatic (optional upgrade for semi/burst/auto).
• 18 round detachable magazine.
• Optional 200 round hopper adapter (sold separately).
• Internal Flexi-Air system.
• All metal construction.
• M4 style charging handle.
• Removable carry handle.
• M4 Style front sight.
• M4 Style hand guard.
• 14" Tactical Barrel.
• Works with CO2/Compressed Air/HPA/Nitrogen from all tank sizes.
• Maximum range: 300 feet.
• Effective range: 150 feet.

Your T68 comes with the flexi-air system and the air is inside the butt-stock. You will need a remote line in order to use this paintball gun.