Get your pick between between the WE System or thr GHK System with the RA-Tech Custom F-1 Firearms GBB now available at Airsoft Taiwan. The common custom parts used by these are the RA F-1 Firearms kit, RA Precision Inner Barrel, RA 7075 Forged Receiver, RA Receiver Extension, RA MK16 Maritime Bolt Stop, RA Recoil Buffer, and the RA CNC Steel Bolt Carrier. Also added parts are from Maple Leaf.

• RA-TECH F-1 Custom Works Firearms GBB (GHK System)
• RA-TECH Custom Works F-1 Firearms GBB (WE System)