Black plastic ring behind gas piston

[Rayleigh_Scattering]

I have a generic Turkish 12ga semi which was built with a black plastic ring about 8mm thick between the back of the gas piston and the front of the action bar rider.

The ring has broken into a c shape. I don't know that it is opening up under the action, but something must have split it originally.

I want to make a replacement, but can’t tell if this was originally a cheap rubber part that has hardened with time/oil, or if it was always a rigidy plastic ring.

Does anyone own a unit with a similar spacer/ring/donut who can tell me what it was like when new?

It is a small part with 6 large ejection pin marks, which I associate with something that was still supposed to be soft when it was pushed out of the mould.

It is also raggedy-hollow in cross section, although I don't know what that is about.

 

[FLHTCUI]

Your going to have to post a generic picture of your make , model and of course the broken bit you are asking about .
So you dont get many of these generic replies
Rob

 

[Rayleigh_Scattering]

Good point.

It is the black ring shown here:

Close up:

Grumble grumble imgur no mobile grumble

 

[straightshooter]

Full disclosure: I know nothing about that particular model.

That being said and looking at the pictures, I'd guess that it was always a hard plastic bushing. The high res, macro images you've posted (nice photos btw) show a right angle from the flat top of the ring over to the sides. A softer 'O' ring kind of material wouldn't likely have sharp edges like those.

If it had been softer plastic when made, you would expect that it wouldn't harden uniformly across the whole piece - there should still be some softer areas, especially in the interior.

Should be much easier to make a replacement from hard plastic than it would be for one made of rubber. I'd make the hard one and see what happens.

 

[Rayleigh_Scattering]

>material

Thank you. I have not yet been able to figure out what brand/part number this shotgun is.

Whatever markings it had were painted over by a previous owner. Other than it having a mishmash of features from other Turkish state arms factory products I haven’t been able to find any data. I tried emailing them with photos, and got nothing for it but a note in my CSIS file.

I would be very appreciative of anyone who can tell me “those are the same guts as in my <model> from <year>“

The material is strange. The edge finish of the split under magnification is glassy smooth, so there is no fiber reinforcement. And if the goal was a non-compliant 8mm spacer, then why add a part rather than making either the piston or action rider a bit longer?

 

[Winchested]

>material

Thank you. I have not yet been able to figure out what brand/part number this shotgun is.

Whatever markings it had were painted over by a previous owner. Other than it having a mishmash of features from other Turkish state arms factory products I haven’t been able to find any data. I tried emailing them with photos, and got nothing for it but a note in my CSIS file.

I would be very appreciative of anyone who can tell me “those are the same guts as in my <model> from <year>“

The material is strange. The edge finish of the split under magnification is glassy smooth, so there is no fiber reinforcement. And if the goal was a non-compliant 8mm spacer, then why add a part rather than making either the piston or action rider a bit longer?

Because it's a cheap bottom grade gun.

 

[cosmic]

Get one made out of brass or aluminum....

 

[Rayleigh_Scattering]

>bottom grade gun

Yup. And next time I’ll go with something that has a logistics chain behind it.

I suppose I could turn up a few in matl ranging from rubber-mat to nylon and run ‘em.

 

[rembolt]

Get one made out of brass or aluminum....

Or Delrin . it looks as though the oem part offers a bit of buffer to the other metal parts in the action .

 

[Rayleigh_Scattering]

Generally, where should these things be in terms of ejection?

Right now the hulls land on the ground a few feet away.

Is that right? Or should it be more “30 feet at 45d deg right.” like the old SVT?

 

[FLHTCUI]

Generally, where should these things be in terms of ejection?

Right now the hulls land on the ground a few feet away.

Is that right? Or should it be more “30 feet at 45d deg right.” like the old SVT?

If your shells are ejecting clearly and not hanging up then I would say the gun is operating as designed....
Rob

 

[Rayleigh_Scattering]

>as designed

It works, most of the time, and from the hard and heavy wear I see on the internals I know it worked before.

Sadly, despite the cheesy construction and lack of logistic support it fits me better than any other shotgun I’ve tried. The crooked handle fits right, the sights weld and line up just right, and it’s lines are clean and neat. Even the DIY krypton camo has the mix of amateur and worn-off that I cherish.

I’ll try a few rings and see how it goes.