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MadBull Airsoft Ultimate Hopup Unit for M4/M16 Series Airsoft AEG

ID: 32281 (Hopup-MB-Ultimate)
Hopup unit
Madbull859188322813Hopup unit32281
3.8 stars, based on 23 reviews
MadBull Airsoft Ultimate Hopup Unit for M4/M16 Series Airsoft AEG
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MAP ProtectedExempt From Coupons
The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.
Compatible with all Marui compatible M4 series Airsoft AEG. The Ultimate Hopup Unit designed by MadBull

Parts and Materials:
Metal body, includes a famous MadBull blue bucking (60 degree)
Tracer unit is optional.


(1) The LED Tracer Unit: You can buy it separately and attached to the Hopup unit. Use your AEG battery and connect to your Tracer Unit. The LED can brighten the tracer BB when BBs are in the chamber.

(2) Chamber Lock: Designed by Brian Holt. With this new hop up design you will not have to worry about losing and dropping several bb??s with a magazine change. This new design provides you with a way to keep bb??s in your AEG and ready to use and not on the floor and even better it stabilizes the top of the magazine to ensure a secure and flawless feed of bb??s into the AEG.

CAUTION: This hop up unit is designed for the experienced and responsible Airsoft player. With the magazine removed the AEG is still able to fire several BBs. Always wear safety goggles and treat all Airsoft weapons as if they were loaded.

(3) Easy Adjustment Wheel device: Use TM G36 style adjustment device and apply on the M4/AR unit.

- Full Metal Housing for maximum durability.
- Hopup rubber packing included. Fits all M4 hopup rubbers.
- Adjustable hopup dial.
- Fits all metal bodies. (Exclude KWA metal body).

Compatibility:Matrix, Dboy, Echo1, JG, Classic Army, G&P, SRC, AGM, Tokyo Marui, VFC and other m4 / M16 series Airsoft AEG.
Note: This product will work with plastic body AEGs however some modification is required. Professional installation is highly recommended.

About Madbull

MAD BULL Airsoft, established in 2004, is world famous for it's Airsoft accessories. Our major focus points are: Airsoft guns, Airsoft Toy Launchers, Airsoft Toy B.B. Showers, and Upgrade kits.We have a very strong R&D team and we put a lot of effort in designing new and exciting new products for the airsoft community.

23 Customer Reviews

(Write a review)

by Noah B. on 07/28/2023
"Works well. I actually prefer this hopup over the Retro Arms CNC hopup. This has a tension spring and a hopup bucking. Even thought this isn't the prettiest hopup unit. It does its job very well. Way more consistent shots when compared to my stock hopup unit. Will definitely use in future builds. (fits in my G&G CM16 SRL)
by Kurt M. on 05/14/2022
"So after I put a matrix 3000 and this in my lancert gen2 the first 5 to 10 shots are like 5 feet of range then the rest are up to 50 yards anyone know anything or way to fix this
by Daniel C. on 03/05/2022
"We are new to airsoft and have Lancer gen2 to start with, but quickly realized the guns needed upgrading for consistency and range. Have installed three of these on three Lancer Gen2s. The buckings that come with the unit are nicer than the stock Lancer, softer with better grip. The nubs are a huge upgrade, Lancer nubs are really squishy. Madbull nubs seem to be a medium. The hop unit seems to be high quality two piece cast and welded together. Seams are well done. Barrel fits tight with bucking. Plastic pieces are quality. Consistency and range from stock Lancer hop up was much improved.

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