AR15.Com Archives
 Who makes LMT barrels?
OlCrow  [Team Member]
1/20/2011 11:51:21 AM
The standard 16" 1/7 twist as used on their Defender.

I have been told Mike Rock, LMT and Rock Creek.

Does LMT make any barrels?
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PFC_Kramer  [Team Member]
1/20/2011 12:27:43 PM
mike rock is rock creek. Hard to confirm but I've always heard he supplied lmt with the mrp barrels at least.
durabo  [Member]
1/20/2011 1:04:09 PM
LMT- Lewis Machine and Tool. I just learned some interesting history about LMT tonight. Apparently Karl Lewis was one of the founders of Eagle Arms, which was a retail business run beside LMT until Eagle was sold to Mark Westrom. Westrom later obtained the rights to the Armalite brand, and combined the two. This info is from an article by Zak Smith in the 2007 Book of the AR-15. LMT is also a government contractor, and has good quality control. LMT apparently makes their barrels in a different way than other manufacturers, which allows greater accuracy. Most companies buy their barrel the correct size then send them to be chrome lined. As part of this process, the barrel is etched with chemicals which remove a very small amount of the material. This makes room for the chrome lining, but is apparently an imperfect process. LMT buys their blanks from Mike Rock (a barrel maker with a very good reputation for match barrels) and has them made slightly larger to avoid the need for the etching process. This apparently results in a slightly more uniform process, and better accuracy. LMT has only entered the commercial market in a big way in the last few years, but now there are multiple vendors on the EE with their products available. LMT has a good reputation with folks who train for a living as well.

/end quote.

from http://www.ar15.com/content/page.html?id=493
SSeric02  [Team Member]
1/20/2011 2:01:13 PM
I know there were some factory shorty LMT uppers a few years ago with stainless 11.5" Hbars that were advertised as Mike Rock barrels.
htony1  [Member]
1/20/2011 2:37:15 PM
Originally Posted By SSeric02:
I know there were some factory shorty LMT uppers a few years ago with stainless 11.5" Hbars that were advertised as Mike Rock barrels.


These barrels where great 1/9 barrels. very accurate and worked great. Trying to find another one but I can't.
SSeric02  [Team Member]
1/20/2011 2:40:11 PM
I choke myself once in a while for selling the one I had.
OlCrow  [Team Member]
1/21/2011 9:53:22 AM
LMT buys their blanks from Mike Rock (a barrel maker with a very good reputation for match barrels)

Is this the answer? LMT buys barrel blanks from Mike Rock and does all their own work on the barrel blanks?

What exactly is a barrel blank? Are the barrel contours cut, cut to length, bored and rifling cut?

LMT does the chrome lining?

Just trying to figure out who does what.

And I found this on LMT's website in the discription of their Defender 16"

"
Cryogenically treated barrel to increase accuracy, barrel life and easier cleaning "

I never noticed that before. Is this something new or have they always does this?

I own a Defender and didn't know they
Cryogenically treated their barrels.


Raizo_Sekai  [Member]
1/21/2011 1:43:42 PM
I'm not for sure who exactly makes them but my 10.5 MRP is pretty accurate
FMJ  [Team Member]
1/21/2011 8:17:04 PM
Originally Posted By OlCrow:
LMT buys their blanks from Mike Rock (a barrel maker with a very good reputation for match barrels)

Is this the answer? LMT buys barrel blanks from Mike Rock and does all their own work on the barrel blanks?

What exactly is a barrel blank? Are the barrel contours cut, cut to length, bored and rifling cut?

LMT does the chrome lining?

Just trying to figure out who does what.

And I found this on LMT's website in the discription of their Defender 16"

"
Cryogenically treated barrel to increase accuracy, barrel life and easier cleaning "

I never noticed that before. Is this something new or have they always does this?

I own a Defender and didn't know they
Cryogenically treated their barrels.




I have a Email from them saying they use 4140 on all goverment contracts
I have also been told by them they use 4150


I wish LMT would list the type of steel used

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