Get the HKparts.net Ejector. It solved similar issues on my POFK
Have you tried cycling the weapon with live rounds by hand? I'd put some oil/Vaseline on face of ejector. When cycling weapon, should leave a witness mark on back of shell. Gives you and indication of how much engagement/interface there is between the ejector and spent case. There was a post on another thread where guys ejector wasn't coming up high enough during the cycle. It was recommended that he shim up his trigger pack or replace the ejector with the HK 3rd gen ejector. Also wonder if the ejector spring is stiff enough? Could the ejector be bouncing off bottom of carrier during cycle?
Did you read the description carefully and verify the parts were German and actually made by HK and were not just parts they sell made for HK guns? Don't mean to be so pointed but I've tried to save a few dollars and ordered parts not made by HK in Germany. I've done that on purpose and my mistake and I won't use anything but German made HK parts, it removes doubt about the part and also helps stop "stacking tolerances" with non German parts in non German receivers.
George from Alaska
HK45T DA/SA, HK45T Light LEM, Mark 23 90's era, no lockout, P30L v3, P30L Light LEM, USP .45 Elite
rrMP5 SEF select fire - Flemming from a 94
IGF MP5 SBR - now a post sample
IGF HK33 pistol - now a post sample
RDTS MP5 pistol from a German HK parts kit - now a post sample
RDTS MP5 SD pistol from a German HK parts kit - now a post sample
TSC MP5K N pistol from a German SP89 - now a post sample
bunch of suppressors
other NFA machine guns
All you need is a feeler gauge set that comes in both mm and inches and go to YouTube and search for "Measuring HK MP5 headspace". There are a few videos there that show how to measure it. Be sure you are looking at MP5 videos and not HK 91 or 93 types.
There are videos from HKpro also.
Search YouTube for "Adjusting HK Headspace". If you need to you will do it by buying different sized rollers from HKParts or HKSpecialist or RTG.
The nice thing about HK and clone MP5s is that you can fix almost anything by throwing parts at it.
I had the exact same problem with my 5pk when I got it. I replaced the following parts with hk parts and it runs great now.
I would start with replacing the ejector and spring since you have already done the extractor and spring.
Thanks everyone I’m going to replace the ejector and ejector spring. Will let everyone know if that works, seems like it’s a common issue with pof
I have had a POF MP5 clone for about 7 or 8 months now and my friend has one as well. We both have the same problems with our guns and I have swapped parts so many times. I swapped ejector lever with factory HK, lever spring, and had a hand full of extractor springs I was constantly changing. My ejection was so sporadic. I still was experiencing issues. My issues stemmed from the mag well and the way the ejector lever sat in the trigger pack and rode in the channel of the bolt carrier group. I sent my POF to Zenith (down the road from me in VA and was recommended by a dude on Reddit). Before I had Zenith work on my POF, my mags had a lot of play in it when I put them up in the mag well. Once I got my MP5 back (a week turnaround time and a little over $100 in labor/work), my mags are super tight and the ejector lever moves more freely and in the bolt carrier group channel. The whole gun just feels right now.
Hk parts has the gen 3 hk ejector for $50, but Brownells has an hk ejector listed for $36. Does anybody know if these are the same ejectors? I’m not sure if the one at Brownells is gen 3??
I know at about 500 rounds down my 5PK I had to replace my ejector because it wouldn't eject at all. At 300 rounds my roller retainer broke.