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

4.1 stars, based on 11 reviews


Model: HU-GB-01-34

11 Customer Reviews

by Braxton T. on 05/30/2015
"LOOK NO FURTHER!!!!!! This hop-up is the best in the world (personal opinion) I installed this in my custom G&G Combat Machine and it improved my accuracy at those 150 ft+ ranges!

You don't have one yet, Yeah you reading the review go buy it now!!
Needs to be put back in stock ASAP!!
by Ross D. on 04/07/2015
"This is hands down the best hop up unit on the market. It is very well built and will out shoot a pro-win any day. A word of warning. This unit does require slight modification to install. THEY ALL DO. You will need to sand the arm down a little bit on each side for it to fit. This ensures that you the user have control over how tight the arm fits. You want it as tight as you can get it while still allowing the spring to push it back up.

That said with all the additional o-rings, tight fit around the bucking, shims for the wheels, and the ability to eliminate all play in the arm makes this hop up absolutely incredible. And the price can not be beat.

I'll leave you with this, I have installed this in 8 different m4's, they're owners have never been happier. I would recommend the madbull red 60 bucking with H-nub too if you need a bucking.
by Alex R. on 03/12/2015
"I can see that most people found the fit to be too tight, but I saw this as a great thing. Even though the area around the arm required a few swipes with the sandpaper there is no way you will lose hop from unadjustment while shooting. Very secure fit on everything and a much better experience than the other hopups I ordered. The adjustment wheels fit nicely and a shim is included for even tighter tolerances. If you love that perfect fit and hate loose parts, you'll appreciate this.
Lonex Aluminum One Piece Metal Hopup for M4 M16 Series Airsoft AEG Rifles
*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 / ASG

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.

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