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High round-count MR556/762 reports?

4181 Views 11 Replies 6 Participants Last post by  lifesizepotato
For those who have a lot of rounds through their MR556/762s, how have they been holding up for you, and how many rounds have you put through them?

I'm especially curious about that infamous chromeless barrel, as there's a popular thread on another forum where a guy who runs a high-volume range in Las Vegas said their MR556A1 was keyholing badly by just 10,000 rounds. Since being posted lasted summer I've seen this referenced around the internet as proof that HK's ARs are overpriced garbage, so I'm wondering if other people have been having that issue or if it's a matter of running solvents through the barrel or what. I only have a few thousand rounds through mine but haven't had issues yet, though I admit I don't run it as "hard" as others. I have no desire to stir up the chrome lining debate for the millionth time, it is what it is, but is having the barrel shot out by 10k rounds (as his report implies) to be expected?

And I'll probably never come close to 10k on my 762 but I'd be interested to hear about those as well.

Apologies if this has been discussed somewhere, Googling and HKPro search didn't turn up anything except that Arfcom thread.
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I will almost certainly wear my MR556 barrel out. I shoot easily 10K a year in competitions/practice and as soon as it won't hold MOA it's (to me) toast.

My concern is not how long it will last, but where in the name of sweet jemima crackerton can I get a replacement when it does?
 

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If there's no serious effort to determine and track the loss of accuracy off a baseline as the numbers through the tube climb, the claims of round count are interesting, but ultimately worthless.

TOTALLY worthless for a competition shooter.

SERIOUSLY worthless for a law enforcement rifle.

Any gun shooting 4MOA is way more than unacceptable in either role.

If your judgment is "does it shoot the bullet sideways?" You may enjoy a much longer ride. But this isn't usable in any credible role.
 
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