FX FX Mavrick Grub Screw C53

[Quakflak]

Hello All,
There is a grub screw named C53 behind the barrel lock screw. I am wondering what it does and how far it is supposed to be screwed in. What purpose does it serve?

Thanks

 

[hotspark]

If you take it out it's lined up with the port in the barrel. It has a thread sealant on it. That's all I have for you man.

 

[HogKiller]

It's a threaded plug, nothing more, put a bit of teflon on it or thread sealant and put it in until it stops, it'll 'seal' your pellet/slug port a little, no need to get crazy with the torque.

 

[Quakflak]

Thank you for the replies! Much appreciated!

 

[Chukar60]

I believe it is there because that is how they drill or machine the port. Once that is done they tap it and put the grub screw in to seal it.
That is supposition on my part but i could see no other reason for the hole.

 

[HogKiller]

I believe it is there because that is how they drill or machine the port. Once that is done they tap it and put the grub screw in to seal it.
That is supposition on my part but i could see no other reason for the hole.

You are correct, as I said it also seals up the ports a little but it does require a sealant, it does leak a touch of air and I'm prefer to have my expensive compressed air going behind the pellet.

 

[PasadenaMike]

FX USA told men when I had mine was just to put that white seal tape and just screw it down until it bottoms but back it out so it’s free from touching the barrel and that you can remove and install the barrel without damaging the o rings. The only screw you need to worry about is the very front one to remove and snug the barrel

 

[airgunstop.com]

I believe it is there because that is how they drill or machine the port. Once that is done they tap it and put the grub screw in to seal it.
That is supposition on my part but i could see no other reason for the hole.

This is correct. The purpose of C53 is to plug the top port as a result of the block fabrication. If you inadvertently tightened or removed C53, it shall be resealed. C53 shall not contact the o-rings or transfer port of the barrel.