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

Partslist:

- Airsoft Masterpiece BattleCat 4.3 Black

- GK Tactical Stainless Steel Threaded Tornado Outer Barrel for Tokyo Marui Hi-Capa 4.3 GBB - Black

- NexxSpeed CNC Aluminum Hopup Chamber - Tokyo Marui Hi-CAPA 4.3 / 5.1 / Gold Match / 1911

- PDI 6.01x113 Marui Hi-Capa 5.1-5inch

- 4UANTUM Friction Pro-High Performance GBB Bucking

- EDGE Custom Aluminum Blowback Housing Ver.2 for Hi-CAPA/1911 Black

- AIP Reinforced Loading Muzzle for Marui Hi-capa 4.3/5.1

- B.C.P 180% Nozzlespring (2pc)

- B.C.P 110%/130% Recoilspring

- EDGE Custom "Twister" Guide Rod for Hi-CAPA 4.3 Black

- AIP Recoil Buffer for Marui Hi-capa

- CowCowTechnology T1 Frontsight fiber optic

- JLP Slide Racker V5 for TM Hi-Capa 4.3 Silver/Black

*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.