How do you upgrade a Gas CM16

[Mr Monkey Nuts]

Its the GHK GBB internals fitted into a V2 gearbox size, with a redesigned and shortened bolt action, its akin to a closed bolt system. Its not great when compared to more expensive and more modern GBB, but a good compromise and a solid performer.

Ammo size you will never win with, carry more mags or learn to shoot better.

Mine definitely prefers .25 and .28 over .20.

Its strange that you are getting poor range, mine will happily and accurately reach out to 40 meters, (that converts to 60 airsoft meters ) and can be lobbed onto a target up to about 55 ish.

The hop up unit isn't brilliant, and isn't forgiving for poor barrel or rubber quality, first off make sure the unit is cleaned and lubricated properly, ensure the feeding nozzel is returning home into the hop up unit fully. you shouldn't be able to see any of the brass tip. if you can you may need to file some of the bolt cover down.

The barrel can twist inside the hop up unit and can leak, I sealed the hop up rubber with PTFE and wrapped some around the outside of the rubber to make it a tighter fit in the hop up. It doesn't have the ususal brass ring to stop soem blow past for some reason only known to GHK.

G&G green hop up rubber is usually quite good, make sure its in good nick and make sure the nub is still in place, it can fall out when removing the barrel.

Similarly the G&G barrels are usually pretty good, give it a good clean with some bog roll and IPA while its out.

Its also worth double checking the condition of the O ring piston seal, its not as smooth a bore as I would like, and can get caught and damaged if not heavily and regularly lubricated,

There is a good website with an install and strip down guide, I will try to find it for you.

 

[MrCheesman94]

Thanks for all the help this is what i have decided to do;

I have purchased the following;

Angry Gun Wire Cutter Rail System (http://www.ebairsoft.com/angry-wire-cutter-rail-system-gbbaeg-inch-p-8208.html)

KAC 16 inch OUTER BARREL (http://www.ebairsoft.com/iron-airsoft-1111d-inch-outer-barrel-p-6580.html)

AABB WA GBB 6.04mm Inner Barrel (http://www.ebairsoft.com/aabb-604mm-inner-barrel-copper-p-3121.html)

A Plus Studio Hop Up Rubber for VFC Viper GBB system (http://www.ebairsoft.com/plus-studio-rubber-viper-system-p-6066.html)

I'm thinking keep the 30 round mag and make it a dmr

 

[Mack]

Thanks for all the help this is what i have decided to do;

I have purchased the following;

AABB WA GBB 6.04mm Inner Barrel (http://www.ebairsoft.com/aabb-604mm-inner-barrel-copper-p-3121.html)

A Plus Studio Hop Up Rubber for VFC Viper GBB system (http://www.ebairsoft.com/plus-studio-rubber-viper-system-p-6066.html)

Doesnt the G&G take AEG barrels and rubbers not GBB ones?

 

[MrCheesman94]

Doesnt the G&G take AEG barrels and rubbers not GBB ones?

Honestly i wasn't sure but if thats the case i better change my order quickly lol

 

[PT247]

if it is a converted AEG then it should take AEG barrels and hop components

 

[MrCheesman94]

no its a genuine GBB not AEG conversion but i'm assuming it shouldn't affect it to much also when i have all bit i will take a before and after pictures

 

[Monty]

Everything is the same as its AEG counter part just has a gas blow back gearbox, so it isn't a genuine GBB.

 

[Mr Monkey Nuts]

oops you do need an AEG hop up and barrel.

Here is that link: http://www.gtapex.com/08/airsoft_ghk_gbbar.html

 

[Mr Monkey Nuts]

Everything is the same as its AEG counter part just has a gas blow back gearbox, so it isn't a genuine GBB.

If it has a gas blow back gearbox how is it not a genuine gas blowback? it uses gas and it blows back, just because its a different configuration to other GBBs doesnt make it any less valid.

Also it uses an AEG hop up and barrel and mimics the shape of a V2 gearbox, nothing else is interchangeable with an AEG at all, even the fire selector is diffrent.

 

[Monty]

If it has a gas blow back gearbox how is it not a genuine gas blowback? it uses gas and it blows back, just because its a different configuration to other GBBs doesnt make it any less valid.

No, he said that it was a genuine GBB and not a AEG conversion, but it's the opposite.

 

[Mr Monkey Nuts]

<_< GHK make the part and sell it as a standalone. G&G fit it to their body and sell it as a factory build GBB, so yes its a genuine GBB, His gun was never built as an AEG, so was never converted to one.

http://www.zerooneairsoft.com/product_info.php?products_id=8297

 

[MrCheesman94]

That's fine thanks guys i will change the order quickly thanks

 

[GiantKiwi]

no its a genuine GBB not AEG conversion but i'm assuming it shouldn't affect it to much also when i have all bit i will take a before and after pictures

Its an AEG conversion.

You can cancel the rail also, it only comes in 3 versions (WA, WE, PTW), none of which will work on an AEG upper.

 

[GiantKiwi]

His gun was never built as an AEG, so was never converted to one.

http://www.zerooneairsoft.com/product_info.php?products_id=8297

Yes it was, it is Combat Machine with GHK box in it. AEG Conversion. /EOD

 

[MrCheesman94]

Its an AEG conversion.

You can cancel the rail also, it only comes in 3 versions (WA, WE, PTW), none of which will work on an AEG upper.

i have looking into it and from what i have found it should fit

 

[Monty]

His gun was never built as an AEG, so was never converted to one.

http://www.zerooneairsoft.com/product_info.php?products_id=8297

.yes it was.. They just replaced the aeg gearbox with a gas one.

 

[MrCheesman94]

.yes it was.. They just replaced the aeg gearbox with a gas one.

Ok, so we have established that its not a real GBBR but why would that rifle not fit, i dont mind if its slightly out

 

[Monty]

but why would that rifle not fit, i dont mind if its slightly out

What rifle?

 

[MrCheesman94]

What rifle?

The G&G CM16 i couldnt see why it wouldnt fit it says fits AEG and GBB m4 http://www.ebairsoft.com/angry-wire-cutter-rail-system-gbbaeg-inch-p-8208.html

 

[Monty]

The G&G CM16 i couldnt see why it wouldnt fit it says fits AEG and GBB m4 http://www.ebairsoft.com/angry-wire-cutter-rail-system-gbbaeg-inch-p-8208.html

It'll fit 'milspec' M4's. Have you tried removing the front end of your M4 yet?