My HK MR223 jam like s**t

P

proflui

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I am shooting my MR223 using EMAGs. And curently my gun jams seriously. I did not number my mag so I do not know whether it is the mag problem or my rifle's problem. It always jam on my second or forth round. When it jam, the new round is unable to fully enter the chamber when the bolt is closed. The bolt always hit the case of the round, and the round like standing vertically when looking through the ejection port. It is not a double feed since no other round is inside the chamber and the previous case always eject successfully. Any advice?
 
Hundreds of rounds through my MR223 using HK mags and never a jam yet.

I have two E Mags but haven't used them yet. I have a ground down P Mag and it works fine as well.

Rich
 
Number your mags and try some different ammo.

Since the problem you're having is consistently on the second or fourth round, it leads me to believe it's a mag issue.
 
Adamg_55 said:
What ammo are you using? i know the winchester varmint 223 with the hollow point rounds jammed in my LMT. Im pretty sure it was the stuff under 50gr
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That's a good place to start - try some FMJ.

Then the mags as others have suggested. Try it with the mag(s) that came with the gun.

There's nothing wrong with EMAGS as a whole, maybe you got a bad one(s).
 
After 100 round testing for 5 EMAG now I got one suspected EMAG. I will put away that EMAG and test it again during the next CQB match. Last match I jamed like 10 times. Hopefully this time will be better.
 
Kac

reminds me of my knights.. put the wrong buffer or ammo in it and it became a bolt action. Now i run a CZ858 with around 1 malfunction per 1-2000 rounds lol and an AK74 south of the border ;)
 
proflui said:
After 100 round testing for 5 EMAG now I got one suspected EMAG. I will put away that EMAG and test it again during the next CQB match. Last match I jamed like 10 times. Hopefully this time will be better.
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I'd also get another 5 EMAGs. IMO it's always good to have way more mags than you need as sh!t happens.... mags can get dirty or break in the middle of the match, and you may not have time or may be unable to repair them. I currently have 10 Swiss Arms mags (well, the copies from CanAm), all of them numbered and tested before I bring them out to a CQB match. I have another 10 on the way, but would never think of using them in a match until I've tested them and know I can rely on them.

If only I took my own advice with my chest rig... :redface:
 
tex_on_the_trigger said:
reminds me of my knights.. put the wrong buffer or ammo in it and it became a bolt action. Now i run a CZ858 with around 1 malfunction per 1-2000 rounds lol and an AK74 south of the border ;)
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For all the hype about KAC rifles, they sure are finicky. I just got rid of one that had nothing but problems. Eroded my confidence in the rifle. I'll stick to the Swiss rifles myself....they ALWAYS run no matter what you do to them.
 
tex_on_the_trigger said:
reminds me of my knights.. put the wrong buffer or ammo in it and it became a bolt action. Now i run a CZ858 with around 1 malfunction per 1-2000 rounds lol and an AK74 south of the border ;)
Click to expand...

I had that issue with my SR15 with C77 ammo. It worked fine in the first mag, but it didnt lock back on empty. Then it turned into a bolt action. Never had any issues with AE ammo...but it hated C77 stuff.
 
angryeyebrows said:
For all the hype about KAC rifles, they sure are finicky. I just got rid of one that had nothing but problems. Eroded my confidence in the rifle. I'll stick to the Swiss rifles myself....they ALWAYS run no matter what you do to them.
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That's one of the biggest problems with KAC rifles... people ignoring the design specification and expecting them to run anyway.

Like people complaining about why their semi-auto shotgun doesn't cycle birdshot.
 
Interesting to hear the number of problems people have had with KAC rifles.

I have only been around one...Slavex ran one in the Hack course recently. It gave him constant issues, although IIRC once he greased up the buffer and spring the problem went away.

But this thread leads me to suspect that they are, in fact, finicky machines.

That's fine if you are fine with it...but personally I would much prefer a rifle that will eat whatever I feed it.

Note that I am not saying "KAC guns don't run", but that I now have some reservations about those guns...interesting because I had previously been told by what I would consider a reputable source that KAC guns might not necessarily be as reliable as I was expecting, and I kind of ignored him on that, not that I have the money to order a KAC at the moment anyway.

But now I'm wondering...maybe there is something to that after all.
 
I wouldn't fool around:
  1. Field stip the rifle, clean it, reassemble it,
  2. Get a new high quality mag (LAR-15 10 round mag),
  3. use best mil-spec ammo (PMC M193 spec ammo)

If this doesn't work, find an MR223 user/expert in your area and let him have a look at your rifle.
  • Contact local HK guru/expert
  • Contact rifle vendor, importer
  • Contact HK
Everything is possible, but you bought the civilian version of the gun that killed Ben Laden and if it did the job on that a**hole it should do the job punching paper!

HK fanatic when I was younger and had all my hair,
Alex
 
CarbineOne said:
That's one of the biggest problems with KAC rifles... people ignoring the design specification and expecting them to run anyway.

Like people complaining about why their semi-auto shotgun doesn't cycle birdshot.
Click to expand...

Mine was an upper from One Shot and it had problems with any configuration I created. I shot all kinds of ammo through it, used ever buffer and spring combo I had, I even tried several different magazines. Nothing worked, so in the end, it went back to where it came from.

misanthropist said:
Interesting to hear the number of problems people have had with KAC rifles.

I have only been around one...Slavex ran one in the Hack course recently. It gave him constant issues, although IIRC once he greased up the buffer and spring the problem went away.

But this thread leads me to suspect that they are, in fact, finicky machines.

That's fine if you are fine with it...but personally I would much prefer a rifle that will eat whatever I feed it.

Note that I am not saying "KAC guns don't run", but that I now have some reservations about those guns...interesting because I had previously been told by what I would consider a reputable source that KAC guns might not necessarily be as reliable as I was expecting, and I kind of ignored him on that, not that I have the money to order a KAC at the moment anyway.

But now I'm wondering...maybe there is something to that after all.
Click to expand...

I'm with you. In a combat type rifle, it should eat whatever you feed it and keep on going. Why would you settle for anything less.

This was my first exposure to a KAC rifle...needless to say I was thoroughly disappointed.
 
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