What is this?

[Cojack]

Good afternoon guys

I think I know the answer to this already but any advice alongside it would be awesome.

I have a slight wobble on my Marui M4 CQBR front RIS (Upper and lower section) which I am trying to lose - is the best solution for this (other than trying to find bolts to tighten on the rifle which I have tried looking for) to place an optics mount across the RIS on the upper receiver to the RIS on the front rail like below?

RAILS.jpg

And I assume the above is an optics mount of some form?

I understand that one above is moulded into the RIS itself.

Any other suggestions would be appreciated

Thanks

Jack

[FlangTal1ty]

Re: What is this?

G&P Magic Pin - Front pin that holds the upper and lower receiver only this one has a screw through it and it expands and you tighten it to remove the wobble. I used one on my M16 and there is no wobble at all now.

-----Update-------

Sorry I realise your problem was the wobble with the RIS not the receiver. :S

[julesbloke]

Re: What is this?

Madbull RAS Fix! http://madbull.com/catalog/index.php...products_id=50

[badger906]

Re: What is this?

if your barrel nut is on fully tight and theres still wobble, try shimming it a little. i had to shim min when fitting my Daniel defense front end, as i had a small amount of wobble before hand.