Madbull Mk18 RIS II on G&P Reciever

[RossUK88]

Hi Guys,
I thought I was going to run into this problem from what I've read but the barrel nut doesn't screw onto the G&P body, I know there is a G&P nut out there but the entire world seems out of stock. Do any of you know where I can get one?
What I have seen is the modification tool, but unsure on if I need the Pro or Entry level and if it would even work with my receiver?

As a third option I could get a new upper receiver I guess, I'm having a few teething problems with this upper anyway so it probably wouldn't be a bad shout. However they all seem a tad expensive apart from the $9 one on eHobbyAsia which is currently out of stock.

I can post pictures as required but any help would be greatly appreciated.

Thanks, Ross.

[Darkmikey22]

Re: Madbull Mk18 RIS II on G&P Reciever

What make of rail have you bought chap?
I have the Madbull version and the nut fits spot on to my G&P receiver.

[RossUK88]

Re: Madbull Mk18 RIS II on G&P Reciever

It's the Madbull one "Madbull MK18 9.5 Daniel Defense SOPMOD II RIS II Handguard"
From the research I can find my G&P Body is an imperial thread but the Barrel nut is Metric.
It does it's first 1/2 turn, stops and you can see its not sitting right.

[harry66]

Re: Madbull Mk18 RIS II on G&P Reciever

I done the same as you the g&p barrel nut fitted fine, I had a g&p moe with madbull dd rail only thing I had to do was lathe off the cogs and use steelsons to tighten it up, The thread difference is so minute in most cases you can't tell the difference

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If still no luck there is a madbull barrel nut that fits g&p receivers

[RossUK88]

Re: Madbull Mk18 RIS II on G&P Reciever

A guy from work says his brother is an metal worker so I've given him the bits to see if he can re-tap my receiver. See what comes of that else I'm looking at a new upper.

There is a barrel nut for G&P but the entire world seems out of stock

[mack]

Re: Madbull Mk18 RIS II on G&P Reciever

You could always cut the spikey teeth of the original g&p barrel nut and file it down to the right size. I had to do it to my old g&p to fit a madbull rail.

[harry66]

Re: Madbull Mk18 RIS II on G&P Reciever

Yes same as me cut cogs off and file of lathe about 2mm and it will be fine, but I'd try tap a new barrel nut incase it damages the upper meaning a costlier fix

[RossUK88]

Re: Madbull Mk18 RIS II on G&P Reciever

Yes same as me cut cogs off and file of lathe about 2mm and it will be fine, but I'd try tap a new barrel nut incase it damages the upper meaning a costlier fix

It may be costlier but having no barrel nuts in stock anywhere I can find it might be better to tap the receiver atleast then I can source a replacement. Although I do understand where you are coming from.

You could always cut the spikey teeth of the original g&p barrel nut and file it down to the right size. I had to do it to my old g&p to fit a madbull rail.

Its been a project so I bought the body as is and not with another rail. Can't seem to find any nuts from anywhere on the net.

[mack]

Re: Madbull Mk18 RIS II on G&P Reciever

It may be costlier but having no barrel nuts in stock anywhere I can find it might be better to tap the receiver atleast then I can source a replacement. Although I do understand where you are coming from.



Its been a project so I bought the body as is and not with another rail. Can't seem to find any nuts from anywhere on the net.

Just google G&P delta ring, Theres plenty will come up