Want to put a bunch of airsoft M4 parts together rather than having a complete one that doesn't have what you really wanted? RSOV.com's offering a personalised airsoft M4 service for you. Just check the service page what you can request to be put together... "RSOV is going to customize your personal style 'Complete AR AEG' at a reasonable price, customer can choose from the follwing external parts, including 'STOCK'/ 'BODY'/  'GRIP'/ 'FRONT SIGHT'/ 'HANDGUARD.

And the following internal parts will be fixed:

• Verson 2 (Ver.II) Metal Complete Gearbox
• Fitting Length Metal (or Aluminium) Outer Barrel
• Fitting Rear Sight / Delta Ring / Cap / Hop-up Set
• Come with 1pc AR Standard 300rds Wind-up Magazine
• Special Offer Package: +USD30 for 1 x 11.1v Li-PO Battery Pack and 1 x Balancer Charger

Custom Made AEG will be using same grade and same model that you chose."