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Discussion Starter #1
Well I may have screwed up. I sbr’Ed my recent pof purchase. I have been dealing with the rifle failing to extract the case where a spent case is left In the gun as the bolt comes forward to chamber a new round. I have run a variety of different ammo and it seems it will randomly weakly extract the cases. It performs the same whether it runs suppressed or unsurpassed. The gun has seen 750 plus rounds down rams so far.

I recently changed out the extractor and extractor spring and unfortunately it didn’t resolve the problem.

Anyone have any suggestions. I was thinking of trying the ejector next? Thanks for the help.
 

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I had an issue with my ejector being bent on my POF-5. It was dragging on the bolt too. If the trigger group hasn’t been worn down like mine from the ejector issue you may be able to replace it with the newer updated HK ejector which has been recommended to me by several others.

It won’t help you since you’ve gotten your paperwork, but Fedarm has been great with my issue and is sending me a replacement. Look several posts down for my POF-5 ejector issue/question thread. I posted several pics of my ejector and how it rides in the bolt. I’d post a link but I’m not all that savvy with this stuff... Best of luck to you!
 

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Discussion Starter #3 (Edited)
Thanks for the feedback I’ll give the ejector a shot. Hopefully this ends up being an easy fix.

It’s weird it will throw brass into another county and then it randomly has extremely weak ejection.


When placing brass in the bolt, does the bolt/extractor hold the brass tight? I noticed with mine it seems loose, a lot touch on the brass causes the extractor to let go of the case rim. Is that normal?
 

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Yep, looks a lot like my ejector did. Bent to the left and worn on the top... Several people have mentioned that the new HK ejector is worth the upgrade, so if there is no other real damage to the firearm, it may be worth looking into. I’ve seen them on HK parts for around $50. I’m no expert on roller lockers and am learning myself so if any seasoned owners chime in with different advise it’s worth listening to them for sure.
 

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Discussion Starter #9 (Edited)
Well hell. Changed ejector and am still experiencing the same issue. Winchester 124gr nato ammo. My reloads were most reliable but still had same issues.

Any ideas?

833394FB-4DA8-436A-888E-AADA5D87DC5A.jpeg

Well hell. My extractor spring is bent. Shaking the bolt causes the extractor to move. Hopefully this was the problem today. Wish I brought the spare.
 

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The extractor and spring should hold a live round without it falling out. If the round falls out replace your spring. If the spring holds a live round and the gun still won't extract and eject properly check/replace the ejector, be sure it moves freely and is high up into the slot in the bolt head. Check the claw tip of your extractor for missing pieces/breaks.

There is more but this is a good place to start and is normally found to be the problem.


Sent from my SM-G950U using Tapatalk
 

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Discussion Starter #11
Oh it was my extractor spring. It couldn’t even hold the extractor. Wish I checked it before I went out today with new ejector. I should hopefully be good to go next time.

Hopefully this is it.
 

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Did your stock fit real tight? I’ve noticed multiple people on here mention that their pistol braces fit real tight and they have issues with them that they didn’t have with with the end cap.

Edit: Didn’t see your post about the extractor when I responded. I ordered an HK ejector and several of the silver rifle extractor springs for my POF and won’t do any testing with my replacement until those, and my new rear sight arrive.
 

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I would also take the end cap off and by grabbing the recoil spring move the bolt group up and down the guide rails and make sure everything is smooth
 

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Discussion Starter #17
Bolt carrier moves smoothly and end cap is as snug as my b&t stock. Hopefully the new ejector with new extractor spring will cure it. Attached are some new pictures of the hk ejector. This look normal?

794A6A7C-E87F-4072-94E0-BF7ABD676E55.jpeg

297B6D7C-5405-4DC4-8A54-BAF22BEBF0B0.jpeg
 

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Discussion Starter #18
Gun ram way better. But I was getting a new failure. A new shell would stripped from mag and pushed almost all the way into the chamber. Pull trigger and nothing. Open bolt and extract round and brass on life shell was bent and marked up seen in picture below. This probably happened 10 plus times with multiple different mags. Eventually I think this caused new extractor spring to get bent and I had a failure to extract happen. But at that time the extractor wiggles. Any thoughts?

91D481C8-4A09-4A28-8CAE-B0DCC3580185.jpg
 

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The bent extractor spring is suspicious.

Are the primers marked by the firing pin? I would suggest checking the bolt gap. Anything beyond .020" and you may experience light firing pin strikes, but the MP5/HK94 is a more forgiving pattern to that in some regards.

Also, with your various magazines, do these failures occur on the first or last round?

Another possibility is POF's Trigger Pack/Housing is sitting too lower on the receiver which can cause a whole mess of failures.
 

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Discussion Starter #20
The click and no bang there was no marking on the primer which I thought was weird. What I did notice is when this happened the bold wasn’t fully closed, maybe 3/4 closed. Which I thought was interesting.

The failures seemed to happen in the middle of the magazine.
How can you tell if the pack is sitting too low?
 
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