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

Partslist:

- Airsoft Masterpiece BattleCat 5.1 Matt Silver

- AIP Front & Rearsight 5.1

- DR.Black Dinging Outerbarrel 5.1 Black

- NexxSpeed Hop-up for TM 1911/Hicapa Silver

- PDI 6.01x118mm Stainles Steel Innerbarrel

- Maple Leaf Decepticon bucking 60degree

- AIP CNC Hammer Protection pad Black

- 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.