Package Comes With: 1 x T68 Gen4 marker (.68 caliber) 1 x Internal Flexi Air System 1 x M4 Style Hand guard and Site 1 x 14" Tactical Barrel 1 x Magazine Kit 1 x 18 Rounds Detachable Magazine 1 x M4 Detachable Carry Handle with Iron Sight 1 x M4 Style Charging Handle 1 x Year Warranty There are 9 different air options to choose from: Option 2: Your marker comes with a 14" Tactical barrel, you can upgrade your barrel to rifled version for better performance. Option 3: With this 200 rounds hopper adaptor and you can change out your magazine fed marker to use a hopper Option 4: This kit comes with all the o-rings to completely rebuilt your marker Option 5: This tool kit has all the tools for you to service your marker Option 6: Extend your manufacture warranty to 3 years Option 7: Add additional magazines to your package Option 8: Add a hard cover carrying case to protect your marker. This is an excellent storage case. Option 9: Additional 5oz cylinder to your package