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ZCI CNC Aluminum One Piece Rotary Hop Up Chamber Set for M4 / M16 AEG Rifles

ID: 11865 (Hopup-ZCI-M-278a)
ZCI Ltd.859188118652M-278a11865
4.7 stars, based on 3 reviews
ZCI CNC Aluminum One Piece Rotary Hop Up Chamber Set for M4 / M16 AEG Rifles
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ZCI Ltd.



  • Precision CNC machined aluminum construction
  • Anodized finish
  • Durable one-piece design
  • Rotary adjustment dial

Manufacturer: ZCI

Color: Color may vary


Material: Aluminum
Type: One Piece Rotary

About ZCI Ltd.

Zhucheng International CO., LTD (ZCI) specializes in research & production of precision Airsoft parts.

3 Customer Reviews

(Write a review)

by Carlos G. on 08/26/2021
"Feeds well, easy to set up, comes with an ok bucking and nub.

Worth every penny imo
by Johnny N. on 01/16/2021
"Its really good, feeds perfectly and hops really consistently in my custom m4. The only "issue" is that the hop up is red rather than the blue shown, but it doesn't really matter for me.
by Dean N. on 11/30/2021
"bit loose around the barrel/bucking, but you should be Teflon taping that joint anyway. couple extra wraps made it nice and tight, now it works perfect. easy to adjust and stays adjusted exactly where you put it. well machined and looks/feels good. no real complicated other than it being a bit loose, but that may be intentional to allow greater parts compatibility. have Teflon tape on hand and you're good.

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