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Discussion Starter · #1 ·
A few weeks ago I picked up a used S2K. For the most part it is functioning well but I had one jam that concerns me. Here's the ejection port on my gen 1 S2K:



I had a casing jam into the gap in the round follower. (I don't know what the correct term is.)

In the picture the gap is above the lighter metal tab (round follower) that hangs down in the bolt tube, helping to align the round to enter the chamber. The edge of the casing jammed in the pictured gap so that the casing was held in place and the bolt face was pushing the empty case into the gap. I had to use a Leatherman to extract the case, leaving a nice notched shaped slot in the empty. It was a bugger to get the brass out of the spot where the brass was wedged in the notch.

So far, I have only field striped it so I have not removed the bolt tube from the receiver. I am guessing the "round follower" is TIG welded in place in the tube. I was wondering 1) Is gap normal? and 2) If it isn't, What should I do to fix it so empties don't get stuck in there again.
 

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Looks normal to me. What causes "stovepipe" jams is an extraction/ejection problem. Most common causes are a dirty, loose, or damaged extractor; a damaged or missing ejector; underpowered ammo; dirty bolt and receiver; and probably the most common is user error (not holding the butt firmly against the shoulder. When the bolt moves fully to the rear after firing, the empty case is pulled to the back of the receiver and ejected forcefully before the bolt starts moving forward to load a fresh round. Anything that interferes with that full travel will result in an empty case still being in front of the bolt when it closes. If there was no live round also attempting to load against that empty case, the bolt didn't travel back far enough to strip a fresh round off of the magazine.
 

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Discussion Starter · #3 ·
Thanks for the reply.

The jam happened when I was using the Korean drum mag, Glock mags don't cause a problem.

What surprised me is the gap. To my eye, it looks like it wasn't inserted in the welding jig correctly and it was welded up with a gap wide enough to jam an empty brass in there if every thing goes wrong.

Just checking to see if it was normal.
 

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That slight gap between the tube and the receiver cover is normal. The drum magazine probably added enough weight on the catch it may have created more gap. Kel-tec doesn't even recommend using the 33 round mags in Gen 1's, much less 50.
 

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Discussion Starter · #5 · (Edited)
I was not clear and used too many words to describe the part and it's problem.

The red arrows mark the gap I am asking is normal, it is inside the bolt tube:



I can not find the part under the lower arrow in this picture in the exploded diagram in the manual. That leads me to believe it is part of the bolt tube. To me it is logical that it would be welded to the bolt tube so it would not be a separate part. The gap is large enough that brass from an expended round can be jammed into it's full length.

If I were designing the gun the gap would not be there. That is why I am asking if it is normal.
 

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Um, that looks wrong to me.
I would take it apart and clean it.
Check and see if that part is loose.
Good news is if it needs to be repaired, the factory offers very reasonable labor rates.
 

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Discussion Starter · #7 ·
I went shooting with a friend who also has a S2K yesterday. His is an early model gen 1. It does not have the part or the associated slot in the top of the bolt to accommodate it.
 

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This may not help since yours is a Gen 1 and mine is a Gen 2, but the pic below shows what mine looks like. No gap. This piece is removable and is shown in the KelTec exploded diagram as #247 (Upper Feed Ramp). When I took my Sub apart to install an aftermarket trigger and spring kit, that piece fell out of the bolt tube as did the Ejector (#248 - looks like shark fin). Tabs on top of this piece hold it in place in the tube and extend up into the plastic housing (tabs shown on top of housing in my other photo). This piece is mentioned in the MCARBO spring kit installation video below at the 11:47 minute mark. Again, this piece may be different in the Gen1 than it is in my Gen2.



[ame="https://www.youtube.com/watch?v=1esszYk5daw"]https://www.youtube.com/watch?v=1esszYk5daw[/ame]
 

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Discussion Starter · #9 · (Edited)
Thanks everyone.

Part of my problem was that the manual I have is for the early model of the gen 1, that is why the part doesn't show - it doesn't exist in the early gen 1s.

At least now I know what to call the part - the upper feed ramp - and that it is a discrete part. Thanks! I guess it is time for a full tear down to see what's up.

Anyone know of a later version of the gen 1 manual that shows all the parts?

The one in the FAQ here in this sub-forum is for the early model of the gen 1. Kel-Tec has removed the S2K PDF in the download section on their site. I would order a paper copy from Kel-Tec if it is truly for the later gen1 S2K, I'll have to ask Kel-Tec. If I find a new version of the PDF, I'll post it here.
 

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The early gen 1 subs have a barrel hood and a feed ramp at the chamber. Later ones have neither, with the chamber chamfered all around instead. Can you post a picture of yours?
 

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Discussion Starter · #11 ·
I just got off the phone with Kel-Tec. He asked me to email the picture and he got back to me within minutes. His email:

"That will have to come back here for service that part is the ejector plate which is welded on the tube. Go ahead and send it in here for repair and we will take care of the issue."

I bought the rifle used so expect that I will be charged for the fix.

He also said that an updated PDF manual will be available in a "couple of weeks" as they update the web site.

850sub, mine is the later version, the chamber is chamfered, however there is a feed ramp in the mag well, but I don't know how to get a good picture of that.

Thanks everyone for the help!
 

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I just got off the phone with Kel-Tec. He asked me to email the picture and he got back to me within minutes. His email:

"That will have to come back here for service that part is the ejector plate which is welded on the tube. Go ahead and send it in here for repair and we will take care of the issue."

I bought the rifle used so expect that I will be charged for the fix.

He also said that an updated PDF manual will be available in a "couple of weeks" as they update the web site.

850sub, mine is the later version, the chamber is chamfered, however there is a feed ramp in the mag well, but I don't know how to get a good picture of that.

Thanks everyone for the help!
Thats cool. Sometimes that plastic feed ramp will wear or come up missing. Never happened to me with any sub, but I read on the interweb to watch out for it. I hope you get her back running like a top.
 

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I was not clear and used too many words to describe the part and it's problem..............................................................................If I were designing the gun the gap would not be there. That is why I am asking if it is normal.
Sorry, I misunderstood where the gap was you were referring to. I see from your later posts that you have talked to KelTec. That definitely is not an upper feed ramp. I've never seen an ejector plate come loose before. Oh well, KelTec should make you happy in a month or so.
 
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