Shinsung infinity 5.5 Foster fitting

[Oane]

Hi all, yesterday I picked up an old, first gen, nos shinsung career infinity from, a Dutch guy who years ago imported a whole container.

The magazine didn't want to index but after some grease removal, application of some molykote and a stronger spring that pushes the magazine into position the system cocks as smooth a Korean butter.

Now my question is, what thread does the bit for the fill probe have? I want to install a Foster fitting so I don't want to fumble with a fill probe. My first guess was 1/4 BSP but I think the numbers don't match up, the tpi is either 25 or metric 1 and the diameter of the tread is about 13mm.

Anyone know if I can get a Foster quick connect for this?

[Oane]

So far I found one from pyramid air but the 50+ dollars of shipping is a bit too much for a $20 part. So if anyone knows a supplier in Europe or someone who ships for less then I'm happy

[Nomadic Pirate]

What other Shin Sungs does it have still for sale ?

[A.Z. in SC]

What other Shin Sungs does it have still for sale ?

That was my thought too until I saw the posters location 

[SADave]

Check ebay. There is a guy there that I bought mine foster fitting from. He gets them from Best Fittings in this UK and has a check valve in it.

Edit: saw that you're in the EU. Best Fittings should be able to ship it to you.

Got any pics of the gun? Good deal finding a NOS gun.

[Oane]

What other Shin Sungs does it have still for sale ?

None, I got the last one, else I would have brought the others home too 😉 I did ask him about one of the Lever action ones but those where dubious in legality till 2015 so he never imported one of those.

Pictures are coming but I took the rifle apart for re-lubing, the old brown tractor grease was somewhat stiff. And I probably will replace the orings while I'm at it as the first one, in the transferpoort disintegrated.

Is it normal for Korean screws and threads to be a bit wonky?

The booklet says the gun is from 2006 so no wonder it needs a bit of love after 14 years in a box.

[Oane]

I went to ebay and best fittings but I couldn't find the correct one. So far I emailed best fittings, versand haus schneider (this German company has saved me quite a few times with unobtainium parts) and I asked pyramid if they can mail it a bit cheaper.

Maybe I'll end up making a fitting on a lathe if nothing else comes trough.

[SADave]

https://www.bestfittings.co.uk/shop/fill-probes-adaptors/custom-parts/career-707-shinsung-sumatra-fill-valve-upgrade/

[Oane]

Thanks SAdave! That's the one, my googling must be off today. I've ordered it immediately.

Here are some pictures because what's a forum without pics with the phone number on the box so you can import your own load of shinsung's. The butpad has this weird black tape like stuff around it that's crumbling away. Probably tape to not get varnish on the rubber.
It's nice. The rifle has open sights, but the rear sight is already broken..... The plastics did not like sitting in a box. Can't wait to shoot it but luckily I just got an Evanix ar6 and and an Cometa Orion that just came in so I've got plenty to keep busy for the summer.

[Nomadic Pirate]

Those old Infinitys are cool, always loved the shape of the stock.

yep you need a new buttpad

[SADave]

Good looking gun. I actually like the end piece on the 1st Gen guns more then the clamp on the 2nd gen.

One thing to note on the Best Fittings check valve, mine got stuck open the first time or two and i had to blast it with air and close it off quick.

[A.Z. in SC]

Beautiful rifle. I've been looking for that one for a while now.

[VaporTrail]

Lovely rifle. Curious to hear what you find out, as I also have an older Korean rifle that I'd like to put a foster on.

[Oane]

Lovely rifle. Curious to hear what you find out, as I also have an older Korean rifle that I'd like to put a foster on.

I'll keep you posted when I've installed it. Can't wait to shoot this Korean girl but I don't have a fitting for the original probe, and neither do I really trust is as the metal feels a bit off.

[VaporTrail]

I'm looking forward to it. My Hunting Master 2 has a probe that only fits on the fill whip it came with. That, and the female quick disconnect doesn't fit any of my probes. The fill whip end also tapers and seems to have an odd thread pattern, so it doesn't completely screw into any of the female quick disconnects that I have. It screws down about a quarter of the way, but I get alot of air loss when I'm filling.

So, I'd like to convert it to a Male Foster to make filling easier.

[Oane]

So the Foster came in and I've made a thread adapter for the m10 thread on the barrel so I can install a moderator (I noticed no one uses the s word here, is that because of the laws conserning moderaters in the USA?). It fils up perfectly now. I'm not sure if it would for a Hunting Master, does it have the same thread as samyang and shinsung airguns? To be sure amessage to best fittings will make sure you get the correct one.



So finally I could shoot the girl and she has a nice power, around 50 FPE. Earlier I pushed a pellet trough the barrel and notice there was no choke to speak off so I had high hopes for slugs. Unfortunately they don't sit in the magazine well, the spring that keeps pellets in place pushes the slugs either forward or backwards while cycling. Of they are pushed forward they are clipped at the tip. Not great but not disastrous. If the slugs are pushed back they fall I to the lever system and infront of the hammer. This must have happend a few times because at some point the hammer space was so full of slugs they started jamming up the bt system and peeking out of the breech. Took me a few minutes to figure out what was happening. Took the gun apart again and found 4 smashed up slugs.





After assembling the gun again she still wouldn't group, I think the pellets are spiralling as they basicly land in a long 45 degree line downwards to the left. So far I've tried jsb beast, jsb monster, eujins and a large selection of slugs.

[VaporTrail]

That looks like some good work there. Nice.

Not so nice the slugs coming out of the magazine.

Not too sure if the barrel is threaded on my HM2, but I'll have that sorted a little later. It'll be sent off to a tuner soon, so hopefully it'll be a bit more serious in the FPE department.