Has many upgrades - Vendetta Precision VDK - Madbull Daniel Defense 12" M4A1 RIS II (black) - Amped Airsoft service assemble hopup/barrel unit - K-Tech amplifier (matte tan) - Magpul STR carbine milspec stock (black) - Orga - Magnus Super Power 6.00mm barrel (363mm) - 7x mags This M4 has enhanced recoil due to the heavy bolt installed. The FPS with .30 BB's is 360-370 FPS. The Delta ring is not tightened all the way due to me not having loctite when I installed the heavy bolt. That is why I have duct tape on it. Gun still functions great. Only used 6 times in games/fields. The tabs are still intact - no zippmann here. I have the tank and the line also, not sure about shipping those especially when the tank still has HPA (high pressure air) in it. The tank I used is a Ninja 77/4500 superlite SL2 system (SLP 300PSI) (black/lime) -$214.99 and the hose is Amped Custom - High Pressure Line (HPL) (red and black spiral) - $64.99. I still have the original box and I have all my receipts the Tippmann and the parts that are on it. Also get ready for kids and adults to ask to shoot the gun, it is very fun to use. Tippmann M4 are also built like tanks. Price is negotiable.