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Posted: 4/26/2021 6:23:51 AM EDT
[#1]
Brother, I’m in the same boat... I can’t find any 1/12 20” A1 barrels anywhere.
Hopefully, Green Mountain will have some by this coming Fall... Not much help, but you can find an A2 barrel, having it machined into an A1 might be the quickest way to complete a build at this time. Good luck with your search!! |
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Posted: 4/26/2021 9:55:51 AM EDT
[#2]
I would just get on someone’s list unless you feel like paying ridiculous prices.
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Posted: 4/26/2021 4:43:17 PM EDT
[#3]
I am on a bunch of lists, Del Ton just Notified me the 20” lightweight barrels are in stock. Their 1:9 twist not 1:12, but beggars can’t be choosers.
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Posted: 4/26/2021 6:51:29 PM EDT
[#4]
The Del Tons most likely will have a .750 journal. As long as you can live with that, they are good.
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Posted: 4/26/2021 6:55:23 PM EDT
[#5]
I plan on machining that part down.
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Posted: 4/29/2021 11:50:58 AM EDT
[#6]
TNTE just shipped my A1 pencil barrel. I paid for it 5 months ago. Good looking barrel 1-9 twist. They’re out of Wi.
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Posted: 5/4/2021 1:10:37 AM EDT
[#7]
Got my Del Ton barrels today. They look nice, and after the gas block portion is turned down these will pass for A1 builds. At least in my book.
 Attached File Attached File |
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Posted: 5/4/2021 6:58:21 AM EDT
[#8]
I've been very happy with my DelTon barrel, and at least with the 1-9 twist I can still run green tips thru it if I want.
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Posted: 5/4/2021 12:04:23 PM EDT
[#9]
I should have bought a batch of 100 Green Mountains when I could. They will leave off the engraving, and leave them unparked too.
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Posted: 5/5/2021 12:22:55 PM EDT
[#10]
Quote HistoryQuoted: Got my Del Ton barrels today. They look nice, and after the gas block portion is turned down these will pass for A1 builds. At least in my book. https://www.ar15.com/media/mediaFiles/533696/5581EF25-09B8-4E98-83FA-214F14FF37C7_jpe-1928984.JPGhttps://www.ar15.com/media/mediaFiles/533696/E810DFEA-F47E-4126-9478-24BE7A40DC92_jpe-1928985.JPG@Flynnchester What's the OD in front of the gas block? You might have to turn down that portion of the barrel too. |
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Posted: 5/5/2021 12:32:17 PM EDT
[#11]
I’ll check when I get home.
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Posted: 5/5/2021 4:44:44 PM EDT
[#12]
I no longer have the original measurements, but you are going to need to turn down more than just the gas block journal. The shoulder just before the threads at the muzzle is slightly too large for a .625 FSB to fit over it. I ended up reprofiling the entire barrel, but you could get away with turning down just the gas block journal and that shoulder in front of the muzzle. The section in front of the FSB should be OK left as-is, but it might look a bit odd if that isn't turned down as well. I also expected to only have to reduce the gas block journal and was surprised when I couldn't slide the FSB on past the muzzle.
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Posted: 5/5/2021 8:33:56 PM EDT
[#13]
Quote HistoryQuoted: I no longer have the original measurements, but you are going to need to turn down more than just the gas block journal. The shoulder just before the threads at the muzzle is slightly too large for a .625 FSB to fit over it. I ended up reprofiling the entire barrel, but you could get away with turning down just the gas block journal and that shoulder in front of the muzzle. The section in front of the FSB should be OK left as-is, but it might look a bit odd if that isn't turned down as well. I also expected to only have to reduce the gas block journal and was surprised when I couldn't slide the FSB on past the muzzle. You're right, I never would have guessed the other dimensions weren't the same just from looking at it. My CMPB barrel is maybe .02 thinner than the DTI in front of the gas block area. |
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Posted: 5/6/2021 12:22:30 AM EDT
[#14]
I just took the measurements;
Gas block .750 Barrel tip .645 Barrel inbetween the two .605 So yes, it looks like a tad will have to come off the tip as well. Just curious, what are the measurements on a GI issue A1 barrel? |
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Posted: 5/6/2021 1:12:06 AM EDT
[#15]
Green Mountain Blank. White Oak Precision bbl extension & pin. Send both w/ your bolt to Paladin Machine in SC and give them your specifications. You'll have to have the metal parkerized or blued yourself, I just send em stainless blanks.
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Posted: 5/6/2021 9:07:07 AM EDT
[#16]
Quote HistoryQuoted: I just took the measurements; Gas block .750 Barrel tip .645 Barrel inbetween the two .605 So yes, it looks like a tad will have to come off the tip as well. Just curious, what are the measurements on a GI issue A1 barrel? From the TDP: A1 Barrel dimensions Gas Block .6238 (+/-.0005) Shoulder Behind Threads .61 Barrel between Block and Shoulder .57 |
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Posted: 5/6/2021 3:38:48 PM EDT
[#17]
Quote HistoryQuoted: I am on a bunch of lists, Del Ton just Notified me the 20” lightweight barrels are in stock. Their 1:9 twist not 1:12, but beggars can’t be choosers. I picked up a 1x9 fsb lightweight barrel a few weeks ago from ar15discounts.com they sold out in about 2 days. I searched around for pencil barrels and signed up for everyone's in stock notification and finally 1 showed up after about 6 months. |
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Posted: 5/6/2021 3:44:40 PM EDT
[#18]
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Posted: 5/7/2021 10:46:58 AM EDT
[#19]
Thanks for posting this
At least it will get me something that looks right on the outside. Maybe someday green mountain will get serious about doing a run or 1-12 pencil barrels. Need a couple more. |
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Posted: 5/7/2021 10:57:52 AM EDT
[#20]
Quote HistoryQuoted: Thanks for posting this At least it will get me something that looks right on the outside. Maybe someday green mountain will get serious about doing a run or 1-12 pencil barrels. Need a couple more. Hopefully by the end of the year there will be some back in stock. I just got a 1x9 for now and will get a 1x12 whenever I can. |
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Posted: 5/8/2021 4:03:35 PM EDT
[#21]
Theres some originals in the EE
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Posted: 5/8/2021 4:28:48 PM EDT
[#22]
Quote HistoryQuoted: Theres some originals in the EE 29 posts and 0 EE, I'll wait. 
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Posted: 5/8/2021 7:20:27 PM EDT
[#23]
Quote HistoryQuoted: 29 posts and 0 EE, I'll wait. Quote HistoryQuoted: Quoted: Theres some originals in the EE 29 posts and 0 EE, I'll wait. Seller is good to go. I’ll vouch. |
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