Tippmann M4 CQB. TDC installed, RED recoil enhancement device from advanced airsoft installed with 1" rof spacer. Increased ROF spring and wide bore trigger group airline and extra TDC in packaging. 48ci/3000 tank and line. Stock buffer spring in pic also has a 1/2" rof spacer on it. Everything in pic included $550 only used 3 times.