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GHK M4 / M16 Airsoft AEG to GBB Complete Gearbox Conversion kit with magazine (Version 1)

ID: 38179 (GB-GHK-M4GBB-V1)
4.4 stars, based on 10 reviews
z GHK M4 / M16 Airsoft AEG to GBB Complete Gearbox Conversion kit with magazine (Version 1)
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Sorry, this item is Discontinued

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This is what G&G, Javelin and other GBB rifles have in them! This innovated GHK gearbox allows you to convert your Airsoft Electric rifle into a GBB in minutes! Swap back and forth with your gearbox for multiple gaming scenarios!
Conversion kit includes one $50 value GBB magazine!

  • Converts a standard M4 / M16 AEG Rifle into a GBB Rifle
  • High Strength Nylon Fiber Shell Construction
  • Full Metal Internal Parts
  • Realistic Blowback Action

  • Gas Type: Green Gas, Propane
    Compatibility For Tokyo Marui and other similar style M4 / M16 Series Airsoft AEG Rifles. Some modification may be required.
    Package Includes: GBB Gearbox, Hopup, Magazine

    Manufacturer: GHK

    Disclaimer: Please use discretion when installing custom parts as fit and compatibility may vary. Some modification may be required. Professional installation recommended.


    About GHK

    Established in Taiwan in 2008, GHK began as the leading manufacturer of AK style gas blowback rifles. In the intervening years GHK has grown to become one of the most highly regarded GBBR manufacturers in the industry.

    10 Customer Reviews

    (Write a review)

    by Anthony C. on 05/07/2017
    "I have both the V2 and V1 of this kit, and the mags are interchangeable between the two. This kit seriously rocks, I've had it for going on 2 years now and it's been through numerous milsim ops (Ironhorse, Faded Giant 5, Ironhorse 2, Dragon Rogue IV) as well as weekend local play. These are basically set and forget kits, I wanted to see how long it'd last with no maintenance, and I'm approaching 2 years on my original kit (v2) and it performs as good as it did on day one. I like this kit because it supports a vast variety of configurations and will fit in most receivers, the only problem I had was with an APS full metal receiver set that I had to painstakingly file by hand for about an hour, but now it works perfectly. The only drawbacks are: that the bolt carrier is made of zinc so I had one shatter on me in a metal body, and they shoot a little hot (1.5-1.7J) with no way of lowering the fps.

    Pros- durable, cheap, FUN, accurate, compatible with tons of parts
    Cons- Can't adjust fps, so might shoot too hot for CQB
    by Matthew F. on 04/28/2017
    "I give this a 4 because out of ALL the good things about this kit. The only major flaw is how stressful this thing is to install! Although once that's done, you will not regret it. I can easily shoot this over 300ft accurately on a mild windy day!
    by Gavin D. on 02/26/2017
    "First off, I would like to say how amazing this kit is, despite my negative attitude forward the trigger response. For me, (a golden eagle body) it required absolutely no modification whatsoever. It shoots great, and I love the kick, but the trigger response is terrible when it is stock. There is a big indention on the left side of the lower part of it, and you can run a screw at the bottom of that circle, and it will give it the best trigger response on an airsoft gun you have ever seen, comparable to a Daytona gun. I did this, and with black gas, I can knock holes in a cow skull, but I don't have a crono, so no real measurement. I also have an angel custom "v" sniper bucking, and a 363mm 6.01 inner barrel. I have a 160mm suppresser and a 8.7 inch barrel, and it looks amazing. It also is extremely accurate with my setup, and if you are in front of the gun, it is deafening. I did this(with no bullets in the gun) and I thought gas was leaking to my left because by ears were ringing so loud. I would recommend this to anyone willing to take on a small project of fixing it up, and sometimes maybe not even that. Overall, good buy. I wouldn't even think before I made the decision to buy again for a different gun. It's a no-brainer.

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    This item is Discontinued.

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