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armorer327
08-12-10, 02:38
Was wondering if there are any lightweight profile 1/7 twist, 20 inch barrels out on the market? Were any made, and are they still available?

pezboy
08-12-10, 10:49
Currently, I'm pretty sure not. FN made some a while ago (replacement barrels?), maybe Colt for Canada, and maybe CMMG. 1:7" 20" barrels are really hard to find. 20" barrels in any twist rate are hard to find now. I think current ones are only being made in 1:9" and non chrome lined. You could have an A2 barrel reprofiled.
Dustin

rocketman
08-12-10, 13:09
Believe it or not Bushmaster made a run of them several years ago. I have one. It's part of one of my favorite uppers. Maybe you will get lucky and can google one of those up.....

oops. Mine is a 16in 1/7 light weight

Boomer
08-12-10, 15:19
Bravo COmpany USA makes 20" uppers with the Government profile barrel (stepped down under the handguard) in 1x7 twist, chrome lined. This will probably be as close as you will get.

jtb0311
09-01-10, 11:36
DEZ Arms (http://www.shop.dezarms.com/product.sc;jsessionid=A2E13C8D796E06B2ED7C97C41821975C.qscstrfrnt03?productId=121&categoryId=-1) offers one, but it isn't chrome lined.

Here's a 603 Clone I built last week. About the only things that are actually over a year old are the furniture and FSB. Shoots great.

http://img833.imageshack.us/img833/7863/ar603clone.jpg

Uploaded with ImageShack.us (http://imageshack.us)

armorer327
09-01-10, 13:11
Thanks for the info, but I think I'm just gonna go the GAU/GUU route on my next project.....plenty of pencil thin 16" bbl's floating around.....

peabody
09-01-10, 19:09
for a weekend shooter, no full auto shooting, i think a non-chromed lined barrel would be just fine.
in my retro build, im going with a better trigger and M4 feed ramps.
will probly just go with a 1x9 twist, for shooting 55's and 62's.

peabody

SoDak
09-01-10, 21:27
for a weekend shooter, no full auto shooting, i think a non-chromed lined barrel would be just fine.
in my retro build, im going with a better trigger and M4 feed ramps.
will probly just go with a 1x9 twist, for shooting 55's and 62's.

peabody

For a retro rifle I would agree. Still, I'd love to make a more modern rifle utilizing a lightweight 20" barrel and I'd want it chrome lined for that application.

LonghunterCO
09-02-10, 17:46
Yea not much out there. I would love one. Saw on a forum a request to DD for one and they said that their barrel machine only allowed for a 16" or smaller length barrel so a 20" was out.
I am seriously considering buying a BCM having ADCO reprofile to A1 and have them pin a .625" FSB.

SoDak
09-02-10, 23:15
Yea not much out there. I would love one. Saw on a forum a request to DD for one and they said that their barrel machine only allowed for a 16" or smaller length barrel so a 20" was out.
I am seriously considering buying a BCM having ADCO reprofile to A1 and have them pin a .625" FSB.

The idea of having a BCM barrel reprofiled has occurred to me as well, but I can't decide if it's worth the cost. Too bad BCM couldn't do a small run of 20" lightweights. Sadly, I don't see that happening since there doesn't seem to be such demand for such a barrel.

armorer327
09-03-10, 12:30
I have a surplus A2 20" barrel, and was thinking of having it re-contoured to an A1 profile, but I'll probably save it for and future A2 project. Sooner or later the A2 will be considered a "retro gun".....

michael word
09-03-10, 22:12
Del-Ton has 20" light weight barrels for sale. They are wilson barrels but are not chrome lined and do not come with m4 feed ramps.
http://www.del-ton.com/Del_Ton_Inc_Barrels_p/bl1028.htm

peabody
09-06-10, 17:07
DPMS has lightweight barrel's, and can option for the chrome lined.

20 inchers.


be great for a 603 .

Ssarge
09-12-10, 12:32
Green Mountain Barrels PMed me a couple of months ago on arfcom saying they were coming out with a 20" LW chrome lined barrel. (M16A1 profile) As i understand it some will be 1/7" and some 1/12". They should be coming out any time now if the time line they gave me is met.

LonghunterCO
09-12-10, 15:03
Green Mountain Barrels PMed me a couple of months ago on arfcom saying they were coming out with a 20" LW chrome lined barrel. (M16A1 profile) As i understand it some will be 1/7" and some 1/12". They should be coming out any time now if the time line they gave me is met.

Should be interesting. The challenge is that several offer "lightweight" barrels but run a .75" FSB/GB not that adds too much weight but I do not think that it looks as good. Hoping GM is a true A1.

.45fmjoe
11-11-10, 13:26
Should be interesting. The challenge is that several offer "lightweight" barrels but run a .75" FSB/GB not that adds too much weight but I do not think that it looks as good. Hoping GM is a true A1.

It is, but they screwed up their first batch and they are 1/2" too short OAL. They are for sale on their website at a steep discount. I asked, and was told it will be after Christmas before new ones are made in the correct length.

LonghunterCO
11-15-10, 19:38
The idea of having a BCM barrel reprofiled has occurred to me as well, but I can't decide if it's worth the cost. Too bad BCM couldn't do a small run of 20" lightweights. Sadly, I don't see that happening since there doesn't seem to be such demand for such a barrel.

From your keyboard to God's ear...
I would go for two or three.

peabody
11-18-10, 19:23
I have a surplus A2 20" barrel, and was thinking of having it re-contoured to an A1 profile, but I'll probably save it for and future A2 project. Sooner or later the A2 will be considered a "retro gun".....






yes, they are retro' :big_boss:


everything nowadays is A4 or M4,

so yeah' the A2 IS retro. :D

peabody

sparky241
11-18-10, 19:36
start looking for a colt sp1 barrel. I have an original m16 barrel on my 20" and love it.

sparky241
11-18-10, 19:41
start looking for a colt sp1 barrel. I have an original m16 barrel on my 20" and love it.

http://www.gunbroker.com/Auction/ViewItem.aspx?Item=200839114