Green Mountain Barrels?

[SoDak]

I've been thinking about doing another M16A1 build since Green Mountain is now making chrome lined A1 profile barrels. However, I'm a bit unsure about how good they are since their first run of barrels ended up being a 1/2" shorter than they should be. Anyone have an idea if one of these barrels would be worth getting? At $90 I'm tempted to pick one up anyway, but I really don't want to buy a junk barrel.

Barrel in question.
http://www.gmriflebarrel.com/productdetail.aspx?id=GM-M15

[flatdarkmars]

Green Mountain barrels are generally reputed to be well made. The barrel you linked is, as you noted, half an inch short due to a manufacturing oversight/foulup, but would be a great start for a 605 (http://98.196.65.94/retroblackrifle/ModGde/CrbGde/605.html) build.

[usmcvet]

I know the 1/12 will do well with a 55 grain round how heavy can you go? That is a great deal on the bbl.

[MarkG]

A significant number of Colt 6940 barrels are manufactured by Green Mountain. They build very good barrels.

[bkb0000]

holly shit.. under $100 for all that?

ordering.

[flatdarkmars]

I know the 1/12 will do well with a 55 grain round how heavy can you go? That is a great deal on the bbl.

I have seen some people report acceptable results with 62 gr. bullets in warm to hot weather. At colder air temperatures they will definitely be all over the place. Personally I stick with 55s in my 1/12 barrels; there's no reason not to; 55 gr. ammo is usually the most commonly available and cheapest.

[usmcvet]

Thanks. That is what I shoot too. I've had 1:9 and 1:7 guns but never a 1:12 before. The price is awesome and would be a great candidate for a fun retro build for the A1 upper I have.

[SoDak]

I ordered one. I figured for the price, it's worth taking a chance. The twist rate isn't a big deal since this barrel will either be an A1 build or I will make it into a small game rifle. For me, 55 grain bullets work fine in either application.

[K.L. Davis]

There is absolutely nothing wrong with Green Mountain... they are good folks and make a very good barrel.

[bkb0000]

I ordered one. I figured for the price, it's worth taking a chance. The twist rate isn't a big deal since this barrel will either be an A1 build or I will make it into a small game rifle. For me, 55 grain bullets work fine in either application.

ordered also... and also not really sure what the fijunk i'm gonna do with it. i don't think i've even held a 1/12 barrel in about 6 years, let alone fired one..

but that was way too good a deal to pass.

[SoDak]

ordered also... and also not really sure what the fijunk i'm gonna do with it. i don't think i've even held a 1/12 barrel in about 6 years, let alone fired one..

but that was way too good a deal to pass.

Did you get a tracking number? My order status says shipped, but I didn't get one. Not a big deal, but I like knowing where my stuff is.

[Dan Goodwin]

I clicked the link and it's showing it's a 1-8 twist otherwise A-1 spec 20-in. for $149.

Where's the $90 one at?

[usmcvet]

Lower on the page. $89.

[Dan Goodwin]

Thank you, but I click that link and the bottom of the page is a Micro UZI SBR barrel, the barrel I referenced shows on the middle of the page?

[SoDak]

I wonder if they ran out of the barrel I was talking about and pulled them from the site. I know a few days ago someone mentioned on another site that Green Mountain was getting low on these barrels.

[usmcvet]

Looks like they're gone. They were there yesterday or the night before.

[Dan Goodwin]

I'm just about always a day late.:sarcastic:

Hadn't even known they were making them till I got an itch for a super-lite walking varmint gun and came to the Vintage board for the first time yesterdaylooking for skinny barrel sources.

Just have to save some shekels after Christmas.

Thank you for your help and Merry Christmas!

[Der Waffenkollektor]

I'm interested in one of these barrels, probably the 1:8 one and was going to order one but, something doesn't add up.

Now that they are out of the 1:12 ones, people might be interested in the 1:8 ones instead however, you might want to look this over first.

If you look at the technical drawing for the 1:12 barrel, it shows, as stated, that it is too short but, otherwise looks correct, even though there is no diameter info.

http://images.ebsco.com/pob/greenmountain/catalog/GM-M15%20Detail%20Print.jpg


However, here is their description of the 1:8 barrel:

M16 A1 5.56mm 20" Barrel, 1:8 twist, 41V50 Mil spec vanadium steel, fully machined and assembled with extension, chrome lined bore and chamber, drilled gas port, parkerized finish.Original 1960s era M16 A1 spec. Click "view detail print" for more information.

Here is the print:

http://images.ebsco.com/pob/greenmountain/catalog/GM-M16_2.jpg

The barrel is the correct length but shows a diameter of .7495 at the gas block instead of approximately 6.25 for a correct A1 spec barrel. Also, when you compare the diameter of the barrel to the diameter of the muzzle threads, you can see their 1:8 A1 barrel is thicker than their 1:12 A1.

In other words, according to the drawing, it is an A2 barrel not a A1 barrel.

Maybe it is a mistake?

I hope Green Mountain gets this straightened out but, at the moment they seem to be dimensionally challenged.

[SoDak]

I got mine today. It looks like the barrel extension has m4 cuts which is interesting. Kind of nice since it gives me more options when choosing an upper.

[peabody]

i ordered one of the 1/12 barrels' looks very nice and well made.


peabody

[fivefivesix]

does anyone want to sell there 90 dollar barrel to me?
please

[p..]

I got mine today. It looks like the barrel extension has m4 cuts which is interesting.

That is interesting. I just picked up a NOS C MP C 1:12 twist A1 barrel. Chrome chamber, unchromed bore. The barrel extension appears to have M4 cuts, and the barrel is about 19.75" from crown to breech.