Century Arms MKE AP5-P....buy it or you will regret it later.

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Originally Posted by Vegas

I ran 124’s but they were my reloads. They were near the top of the charge weight range but probably still not at +P velocity. I need to look up NATO velocity and try to emulate that.

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I believe it's between regular and +P.

My MKE was flakey for the first 200 rounds or so (by my recollection). I was all freaked out, researching, swapping mags, ordering springs, etc....then it just started working perfectly. I shoot mine 1-200 rounds a month and I don't even clean it much anymore (nasty thing). Give it a bit to smooth out.

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Originally Posted by The Dumb Gun Collector

My MKE was flakey for the first 200 rounds or so (by my recollection). I was all freaked out, researching, swapping mags, ordering springs, etc....then it just started working perfectly. I shoot mine 1-200 rounds a month and I don't even clean it much anymore (nasty thing). Give it a bit to smooth out.

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Same here. That is why they give you that note that basically says "Don't call us unless you have shot 500 rounds, got it!"

Mine has been perfect since then, shoots very smooth and is quite accurate for what it is.

Now over four thousand rounds in I started having ejection issues. I swapped in an HK Mp5 spring and it actually increased the failures to eject. (typically the spent case jammed at the top of the bolt. I swapped in a new factory MKE ejector (super easy swap) and the issue disappeared entirely. I just ran 100 Magtech Subsonics and 100 WWB and the issues are gone (and it was jamming 2-3 times per mag (HK)). Just a little update for y'all.

https://live.staticflickr.com/65535/...69932083_o.jpgIMG_8223 by stoiclawyer, on Flickr

https://live.staticflickr.com/65535/...f1da73ed_o.jpgIMG_8224 by stoiclawyer, on Flickr

https://live.staticflickr.com/65535/...2ec49561_o.jpgIMG_8217 by stoiclawyer, on Flickr

Thanks for the update. Where’d you get the MKE ejector?

Arms of America sells a boo-boo kit that has ejector/extractor/springs/firing pin for $35. Well worth it. I had one in my emergency stash

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Originally Posted by The Dumb Gun Collector

Arms of America sells a boo-boo kit that has ejector/extractor/springs/firing pin for $35. Well worth it. I had one in my emergency stash

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Looks like they must have run out of them, couldn't find them anywhere. And for the first time in YEARS my MKE is starting to act up, was gonna replace it with a factory German spring but now I think I might try and source a MKE if I can find one.

Apex has the kits for $39.https://www.apexgunparts.com/mp5-ap5...s-set-new.html Not too bad. MGW wants one million dollars for the same kit...I guess they are going full "cheaper than dirt."

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Originally Posted by The Dumb Gun Collector

Apex has the kits for $39.https://www.apexgunparts.com/mp5-ap5...s-set-new.html Not too bad. MGW wants one million dollars for the same kit...I guess they are going full "cheaper than dirt."

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Thanks.

It's crazy that the German springs don't work. Wonder why that is?

They work. It’s just that I swapped the spring first thinking that was my issue. Once I swapped to the German spring the failures to eject actually got waaay worse. Then I swapped out the ejector (but left in German spring)—after doing this all my problems vanished. I was just swapping one at a time. It still had the original silver spring in it when I swapped to the copper German spring. There is some chance that I swapped the spring needlessly but I had been meaning to swap over to the copper spring anyway.