TTI VSR10 TDC CNC Hop Up Set (One Piece Chamber with TDC) tk45 and optional quick detach sockets

and optional quick detach sockets front and rear round out the external package

and a 1-piece lightweight

but not guaranteed for the Chinese clones (sometimes they make some weird stuff)

Elite Force M4 CFR Next-Gen AEG - Black

The select-fire G18c can change from semi-auto to full-auto with the flip of its rear slide switch

TTI VSR10 TDC CNC Hop Up Set (One Piece Chamber with TDC) tk45 and optional quick detach socketsThe TTI VSR10 TDC CNC Hop Up Set features the same unique properties the Action Army VSR 10 VSR10 Hop Up Chamber provides, but also comes with a custom TDC nub and trolley to offer the best possible control over your hopup. One piece CNC hop up chamber. Easy to install. Made by TTI Airsoft.