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Thread: Green Mountain AR-15 Barrels?

  1. #1
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    Green Mountain AR-15 Barrels?

    Hey guys,

    I have recently received a "20,1:8, gov profile barrel from Green Mountain. These folks are pretty well known for making Ruger 10/22 barrels and Barrels for for blackpowder rifles and pistols.

    The barrel was ordered by one of my clients and shipped direct to me for assembly of an upper. I won't be anything special or "tacticool". It will be a pretty plain jane build.

    GM 20" 1:8 gov profile barrel

    Midwest Industries 15" SS tube

    Spikes Receiver

    BCM BCG ( i'll be head spacing it of course)

    A.R.M.S. 71L buis

    Not sure what optic he's going to go with.. I'll add that later.


    The reason I am bringing it to you attention is that it is VERY reasonably priced and apparently worth a look see from all I've read about them.


    I'll post pics and a range report on this build in the near future.

    (yes, yes, I finally got a digital camera)

    Regards,
    TJ

    ETA: Here's a link to the manufacturer's website: http://www.gmriflebarrel.com/catalog...sriflesbarrels
    Last edited by The_Hammer_Man; 01-27-11 at 16:56.

  2. #2
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    Their prices look nice for the claimed specs.

    Can you test the chamber to see if it's a true 5.56 NATO chamber vs. a .223 Rem?

    Do you have the practical ability to measure things like bore diameter and rifling twist to see how well made it is from a precision standpoint?

    I read the title and was quite skeptical given that company's background. Not that I've heard of any problems with their black powder and low cost AKM barrels.

  3. #3
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    http://www.gmriflebarrel.com/product...aspx?id=GM-M16
    this is the barrel i just bought for an a2 build. it has really thick parkerizing, and the chrome lining looked great. i heard they supply some barrels too colt for one of there rifles.

  4. #4
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    I've had no issues with their 1022 barrels. They have held 1/2" or less at 50yds with the right ammo.

  5. #5
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    Quote Originally Posted by SomeOtherGuy View Post
    Their prices look nice for the claimed specs.

    Can you test the chamber to see if it's a true 5.56 NATO chamber vs. a .223 Rem?

    Do you have the practical ability to measure things like bore diameter and rifling twist to see how well made it is from a precision standpoint?

    I read the title and was quite skeptical given that company's background. Not that I've heard of any problems with their black powder and low cost AKM barrels.
    funny you should mention these actions....

    I intend to perform those tests and a few others such as measuring crown angle and depth and a few other things.

    The end product is going to be this guys "tractor" rifle that he takes with him just about everyday. Seems they've been having issues with feral dogs and hogs in his neck of the woods.

    If it turns out to be within spec I'll probably get another and torture test it. IE, Do a "dirty 20" thang and just beat the holy hell out of it.

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    Quote Originally Posted by The_Hammer_Man View Post

    BCM BCG ( i'll be head spacing it of course)
    Just gaging it or actually changing it?
    Last edited by MarkG; 01-28-11 at 07:38.

  7. #7
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    I've had good luck with GM's 10/22 barrels, and I'm pretty sure Ballistic Advantage uses GM blanks for their .22LR AR barrels - mine has been great. Whether that rimfire experience translates to 5.56, no idea.
    Ken in Illinois

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    If these are as goos as thew rimfire bbls then they will be great. I know for a long time you could not fine a green mountain rimfire bbl, they told people waiting for them that they where concentrating on military and government orders. Could be they where making bbls for Colt. I don't know this as fact just what I've heard.

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    Quote Originally Posted by MK18Pilot View Post
    Just gaging it or actually changing it?

    Ever tried to ream a chromed chamber?

    "shudders at the thought"

    IF it's out of spec I'll send it back rather than try to modify it.

    Remember, it costs time and money to do that sort of thing and 95%+ of my customers cannot/will not pay for that degree of OCDishness on my part.

    Also remember in my OP I mentioned that this rifle will be in the cab of this gents tractor or in the back window of his "pick em up" truck.


    Optic Update: He's finally decided on a scope. A Burris 3-12x. Not a bad choice considering the price point and in a decent mount it will do him fine for the purpose stated.

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    So anyone have one of there AR barrel and have data on it.

  11. #11
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    I have been considering one. I look forward to your findings.

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    any update on this?

    I am about ready to part with my $$ on a GM barrel.

    I know that the 10/22 productes they make are top notch but I'm still reserved on their AR stuff.

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    As crummy as their AK barrels are, there's NO way I'd touch any of their AR barrels. Plus, with so many known good manufacturers out there, there's really no reason to.
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    bkb0000 did a thread on their barrels if I remember correctly. Use the search button, because I remember there being some good info in that thread about them.

    I still wish bkb0000 wasn't banned, I learned a lot of good stuff from him.
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    We miss you, AC.

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    Quote Originally Posted by The Cat View Post
    As crummy as their AK barrels are, there's NO way I'd touch any of their AR barrels.
    Gun Kings had Green Mountain's 16", 1/7 twist, chrome lined, fluted barrels for $159 w/ free shipping.

    I was looking for something decent and cheap for an upper I wanted to play with so I searched this board and came up with:

    http://www.m4carbine.net/showthread.php?t=69527

    I have about 600 rounds through it w/ no issues. I am shooting at small sized paper plates at 100 yards with it and my groups are the same as my 6920 upper.

  16. #16
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    Are none of their barrels available with a FSP installed? I kind of like the option of a 1/8 with a chrome lined bore and NATO chamber, but I don't want to try drilling and pinning a FSP on.


    Saleen
    Last edited by saleen; 05-05-11 at 23:59.

  17. #17
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    Quote Originally Posted by saleen View Post
    Are none of their barrels available with a FSP installed? I kind of like the option of a 1/8 with a chrome lined bore and NATO chamber, but I don't want to try drilling and pinning a FSP on.
    Saleen
    I actually emailed them that question a few days ago and got this response yesterday:

    Hi ___:

    Thank you for contacting Green Mountain Rifle barrel Co. Unfortunately, we do not offer any custom gunsmithing services. You might try one of these distributors of Green Mountain Military barrels:

    http://www.wildhorsemfg.4t.com/ Cody Friede Machine shop

    www.bandhtactical.com ,Military rifle kit builder division of Lone Star Rifle

    You can buy a Green Mountain Rifle Barrel through either of these distributors, or direct from us. Attached is our price list / catalog for your review. I hope you will find this information helpful. Please donít hesitate to contact me should you find that I could be of any assistance with regard to placing your order. Thank you for your inquiry, and best regards with your project J

    Dennis P____
    Customer Service
    I think there's an opportunity for more sales here, either if Green Mountain decides to offer this option, or if someone with the machining capabilities wants to be a dealer and can offer this at a competitive price. It wouldn't hurt for you or anyone else interested to email or call Green Mountain with this question and suggestion.

  18. #18
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    I think Adco could do it.

  19. #19
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    Quote Originally Posted by saleen View Post
    Are none of their barrels available with a FSP installed? I kind of like the option of a 1/8 with a chrome lined bore and NATO chamber, but I don't want to try drilling and pinning a FSP on.


    Saleen
    ADCO does have this service available. In fact they're in the process of doing that for a barrel of mine

    Call it a pseudo update on the OP:

    I've , since then, purchased and installed four more of their barrels. One more 20" and 3x 16" (all 3 had 1:8 twist rifling)

    ALL of them are very accurate and the fit and finish, out of the box, was perfect. The only thing I had to do as an extra service was dimple the underside of the barrel for set screw FSB's. One of which is now in Adco's very competent hands being pinned.

    No complaints about their accuracy either.

    The 20" with a competent shooter behind the stick should have little or no trouble hitting sub moa. The 16"ers average 3/4 MOA to 1MOA... so while not "uber perfect" they are MORE than adequately accurate.

  20. #20
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    Thanks for the update. I did contact ADCO, but I don't know if the cost of having that FSB installed is quite worth it. For less money I could do an A.R.M.S. #41BL without any machine work.....

    The project I inquired about was for someone else, and I think they are holding off on the project for now. I am going to keep them in mind for the future though. I've only got a .22 with their barrel and I've been very happy with how it shoots!


    Saleen

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