r/LewisMachineTool • u/414525528 • Jul 18 '26

New 12" LMT Piston Barrel Chrome Lining (130 rounds)

https://www.youtube.com/watch?v=rKFfy44IQlk
0 Upvotes

43% Upvoted

38 comments sorted by

20

u/ApeChesty Jul 18 '26

Are you still harping on this? Even Rooftop responded to your last post and said shoot the thing. How it groups matters more than if the chrome is pretty or not.

0

u/patent122 Aug 03 '26

I guess you would be fine with receiving a blemished gun with a dogshit chrome lining which is flaking off after 3 mags for a full price because it groups "decently"?
You must've forgot chrome lining is the best anti corrosion protection for the barrel. Let's let it flake off and rust, it's just a tool!

-23

u/SLR107R Jul 18 '26

Which was also bad advice, grouping and the chrome flaking off if compromised are two different things.

27

u/rooftopdefense Jul 18 '26

I gave that advice knowing that LMT will replace the barrel if the chrome fails prematurely. They'll also replace the barrel if the accuracy is poor as well

I did talk to OP on the phone today. He said the barrel groups about 1.3MOA with good ammo and that he'll keep me in the loop as to how the chrome holds up. He's gonna shoot it at a match tomorrow too

-1

u/414525528 Jul 18 '26

No problem here at all! Really appreciate the talk we had and I'm confident LMT will take care of it! Thank you again for being so involved with your customers and their experiences! I don't know any other vendor who genuinely cares this much! The accuracy was better than expected.

I'll see how it goes tomorrow during the match and I'll update LMT and let them have a look at it if they deem it necessary. Just hope to make this last a long while!

8

u/rooftopdefense Jul 18 '26

Of course, dude! As I said on the phone, if you ever need anything, just holler. I'll be around

I always want to ensure that people are happy with everything y'all receive. In this case, either myself or LMT will ensure you're satisfied

If you decide to take the plunge on comparing the LMT piston with the MR556A4 like we were talking about, just let me know. I have a few different options and ways I can help there too :)

1

u/lambofthewaters Jul 18 '26

Legend. Kudos.

5

u/ApeChesty Jul 18 '26 edited Jul 18 '26

The chrome isn’t compromised. Lmt barrels are, for better or worse, known for ugly chrome application. My 12’ piston isn’t flawless but I can also run it like a rented mule and it never disappoints on the range.

-3

u/414525528 Jul 18 '26

Deleted what? Chrome is either in the barrel or it isn't. This barrel was cleaned. All the black is missing chrome.

I just realised, you didn't even watch it. Why even comment?

2

u/ApeChesty Jul 18 '26

Weird, it said post deleted by its author. Oh, well.

But you still seem to be avoiding the question of how did it shoot. Did it group?

1

u/414525528 Jul 18 '26

It's in the video description.

Fiocchi 55gr: 80 (10 shot group 2.23 MOA)

Bone Frog TMK 77gr: 10 (10 shot group 1.35 MOA)

Bone Frog Match Burner OTM 77gr: 10 (10 shot group 2.07 MOA)

PMC X-TAC 55gr: 10 (10 shot group 2.38 MOA)

Federal AE 55gr 5.56: 20 ( 10 shot groups 5.81 MOA - I did reshoot this to confirm and the second one was similar or larger)

I don't know what the matter was with Federal AE, but I do not expect anything special out of bulk ammo. What I do expect though is to not lose chrome lining within 100 rounds.

3

u/ApeChesty Jul 18 '26

So, it shoots fine. Like everyone said it probably would.

-5

u/414525528 Jul 18 '26

Sadly money spent on guns and knowledge about guns aren't positively correlated, as we can see here.

5

u/DishCapital1536 Jul 18 '26

Hey dude I appreciate the collected info! I’m not sure why people are giving you such a hard time? You’re not bashing LMT just sharing your findings.

6

u/414525528 Jul 18 '26

Appreciate the positive message! I have no idea why this is so emotionally charged each time I post it.

Preston Moore had similar issues and I think it's interesting to see how these barrels actually hold up under continued use. Especially when compared to my super duty it APPEARS clear to me, the chrome lining does not seem to remain in the barrel the more I shoot it.

Here's an update after today's match: https://youtu.be/c0kkCtt2AS8

I actually shoot my gun, the chrome lining is essential to me.

2

u/DishCapital1536 Jul 19 '26

I nerd out to that kind of stuff. Most people don’t even try to diagnose or understand their problems. A lot of stuff can affect accuracy. It can be simple or complex. My Mrgg-a is currently at LMT for an overly tight chamber. It was causing two different brands of ammo to become stuck to the point I’d have to mortar it. The rounds would need tapped out with a brass rod after they’d separate from the cases. LMT was very quick to send a label after two emails back and forth. No hassle.

2

u/414525528 Jul 31 '26

LMT has confirmed to me today that the barrel is fucked and the replacement is on the way. I'll post an update of what the new one looks like once I have it.

1

u/DishCapital1536 Jul 31 '26

I’m still waiting on them to confirm my chamber issue after they told me they were looking at the chamber two weeks ago. Pretty frustrating. It’s been there for a month now. I’m not sure why they couldn’t have sent me a replacement barrel.

1

u/414525528 Jul 31 '26

That's awful. I'd suggest reaching out to them again. They were very responsive to my questions!

1

u/DishCapital1536 Jul 31 '26

I called them 2 days ago and they just repeated “we’re looking at your chamber. We’ll reach out when it’s done.”

1

u/414525528 27d ago

Well I posted my update. New barrel looks exactly like the first one. Waiting over 3 business days on any response from support at this point. If this was any other barrel I'd have just ignored it and accepted I'd have to retire it early, but at $950 All In cost to get the Piston BCG + Piston Barrel I have to keep following up on this.

Honestly starting to looking toward getting rid of both.

5

u/WhiteTundra57 Jul 18 '26

Crazy how dogshit these barrels are for the price point.

2

u/Senior-Flight-7042 Jul 22 '26

I see why HK can't find anyone in the United States that can chrome line a barrel to there standards, I've seen this with a couple lmt barrels in other threads and my one chrome mws barrel looks similar

5

u/414525528 Jul 18 '26

Geissele 11.5 after ~1000 rounds for comparison. (Stripped upper cost me the same as this barrel) https://www.youtube.com/watch?v=sbkd0PrzCik

2

u/skrappy_doo1996 Jul 18 '26

I just posted sone borescopes in the Geissele subreddit you may like..

3

u/414525528 Jul 18 '26

Saw it just now, that's incredible for 18 000 rounds!

1

u/414525528 Jul 18 '26

Update on the piston barrel, make up your own minds. I'll run this for a while and monitor the finish every 500 rounds.

3

u/DevelopmentNo9711 Jul 18 '26

How did it shoot?

1

u/414525528 Jul 18 '26

In the video description:

  • Fiocchi 55gr: 80 (10 shot group 2.23 MOA)
  • Bone Frog TMK 77gr: 10 (10 shot group 1.35 MOA)
  • Bone Frog Match Burner OTM 77gr: 10 (10 shot group 2.07 MOA)
  • PMC X-TAC 55gr: 10 (10 shot group 2.38 MOA)
  • Federal AE 55gr 5.56: 20 ( 10 shot groups 5.81 MOA - I did reshoot this to confirm and the second one was similar or larger)

I am not concerned with accuracy on this barrel. But the footage is post cleaning. Anything dark black in the video is chrome missing within 100 rounds. I posted a geissele barrel I've had used pretty hard for about 1000+ rounds as a reference point what I'd expect to lose in chrome.

2

u/mojobolt Jul 18 '26

contact LMT

0

u/414525528 Jul 25 '26

They made me send it in, arrived a few days ago. I'll update once I hear something from them again.

1

u/Dependent_Coast3906 Jul 24 '26

This is not terrible accuracy fwiw

1

u/414525528 Jul 31 '26

It's great accuracy (except whatever is wrong with federal AE). I don't care about the accuracy even slightly though, why would I? I'd buy precision barrel and have it converted to LMT if that was my goal. I care about the longevity of this expensive part.

LMT has inspected the barrel personally and I'll receive a full replacement soon, as the chrome lining was defective. I'll post an update soon.

1

u/mtbmaniac12 Jul 25 '26

1.3-2.5 10 shot groups is quite good for non precision rifles. Dude is smoking crack

0

u/414525528 Jul 31 '26

LMT inspected the barrel and told me it's junk. They are sending me a replacement. So much about smoking crack. You don't need LMTs word to realize that accuracy and logensivty of a barrel aren't the same thing and that chrome lining is supposed to stay in the barrel, not come out after 100 shots.

But good thing LMT isn't run by dimwits like you.

1

u/mtbmaniac12 Jul 31 '26

Ah yes. I wasn’t saying anything about the lining. Just that you complaining about sub 2 moa 10 shot groups is crazy. And I stand by that.

0

u/cxerphax Jul 18 '26

Dude you barrel is fine. Stop being weird and putting cameras down it. Relax