This upper is already pre-assembled to make it easier for you!.

Partslist:

- Airsoft Masterpiece BattleCat 4.3 Black

- AIP Front & Rearsight 4.3

- GK Tactical Steel Tornado threaded Outerbarrel 4.3 Silver

- Airsoft Masterpiece Brass Hop-up for TM 1911/Hicapa

- PDI 6.01x113mm Stainles Steel Innerbarrel

- Maple Leaf Decepticon bucking 60degree

- AIP CNC Hammer Protection pad

- Edge Custom Aluminum ultralight blowback housing black

- AIP Reinforced loading Muzzle

- B.C.P 140% Nozzlespring

- B.C.P 110/130% Recoilspring

- Edge Custom "Twister" 4.3 Aluminum guide rod 4.3 Black

- CowCowTechnology Recoil Buffers.

*PS: Please note: installing parts / assemble /fitting airsoft gun will need intermediate knowledge; for expert or airsoft gunsmith. Please refer to your airsoft gunsmith for proper installation / fitting. Fitting may be needed as the condition of each airsoft gun might be different. Regular maintenance is needed for all airsoft guns in order to keep it in good working condition and reduce wear out issue on parts.