Lonex Aluminum One Piece Metal Hopup for M4 M16 Series Airsoft AEG Rifles


This item is currently Out of Stock

Usually restocked within 1-3 weeks. Add to your wishlist to stay posted!

Model: HU-GB-01-34

8 Customer Reviews

by OLIVER Q. on 12/27/2014
"All metal Hop unit.... Casting was not great. And the top arm had to be sanded down to fit into unit. Clip around barrel is not great quality... a bit over hyped imo.
by Matt L. on 10/29/2014
"Poor quality control. I installed this in my m4 and it didn't feed. Removed the hop up unit and discovered corrosion inside the bb feed tube blocking the path. I had to removed it with a file it appears that the coating they put on the unit did not adhere well. seems to work okay now after filing it down but any part that is brand new should not have these issues.
by Reneboy A. on 05/06/2014
"The fit of the Hop Up lever that goes up and down was VERY tight. I had to thin it out by taping a 200 grit sand paper on a glass table and evenly sand down the flat faces of the hop up until it was able to freely move up and down.
*Hopup unit may require assembling

Lonex Aluminum One Piece Metal Hopup for M4 M16 Series Airsoft AEG Rifles
The Lonex ULTIMATE Hop-up chamber unit is designed for the M4 / M16 family of rifles. This Hop-up chamber unit features top notch air seal and is designed to provide the best possible bb flight control.


  • Made from high quality aircraft grade aluminum alloy
  • Includes Everything for Complete Hopup Unit, Requires Assembly
  • O-Ring Seal on Gearbox Side
  • One-Piece Hopup unit.
  • Bucking and Nub sold separately

Application: For M4 / M16 / SR-16 / M4-RIS and other compatible Airsoft AEG models that uses M4 hopup units.
Material: Aluminum, One Piece
Type: One Piece.
Manufacturer: Lonex

Note: This product is designed to fit common M4 metal bodies. It will work with plastic body AEGs with some modification required. Professional installation is highly recommended. One piece hopup are generally intended for AEG with metal bodies.
This product was added to our catalog on Monday 25 July, 2011.

This item is currently Out of Stock. Most out of stock items are restocked within 1-3 weeks. Some items may take longer. Please add this item to your wishlist to keep posted on its availability.

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