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Posted: 5/8/2022 9:42:07 PM EDT
[#1]
Entire BCG.
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Posted: 5/8/2022 10:34:55 PM EDT
[#2]
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Posted: 5/9/2022 6:44:48 AM EDT
[#3]
I replaced a burnt out barrel last year with a Lothar Walther 18 inch barrel that was advertised as being DPMS. The gas tube length is Armalite length and my my Armalite BCG head spaced fine. I think you’ll be okay with most DPMS barrels but you will need to check headspace so buy yourself some gauges or take it all to a smith.
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Posted: 5/9/2022 9:54:18 AM EDT
[#4]
Quoted: I have a armalite ar10b and I want a new barrel for it. I was looking for an 18 inch (currently a 24 inch) but short of having one custom made I can't find any. I see plenty for the DPMS style. Can you use a DPMS style bolt in the armalite carrier or an entire DPMS BCG in the armalite upper and use a DPMS style barrel? I wish I could go to armalite for the barrel but they have very few parts in stock. Thanks Is your barrel toast, or do you just want a shorter tube? Most .308 barrels can easily last 4000 rounds before accuracy degrades. Removing the barrel and sending it to ADCO Firearms to be shortened, rethreaded and crowned would be a much cheaper option if shorter is all you want. |
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Posted: 5/9/2022 10:13:58 AM EDT
[#5]
Quote HistoryQuoted: I replaced a burnt out barrel last year with a Lothar Walther 18 inch barrel that was advertised as being DPMS. The gas tube length is Armalite length and my my Armalite BCG head spaced fine. I think you’ll be okay with most DPMS barrels but you will need to check headspace so buy yourself some gauges or take it all to a smith. Quote HistoryQuoted: I replaced a burnt out barrel last year with a Lothar Walther 18 inch barrel that was advertised as being DPMS. The gas tube length is Armalite length and my my Armalite BCG head spaced fine. I think you’ll be okay with most DPMS barrels but you will need to check headspace so buy yourself some gauges or take it all to a smith. Quoted: Is your barrel toast, or do you just want a shorter tube? Most .308 barrels can easily last 4000 rounds before accuracy degrades. Removing the barrel and sending it to ADCO Firearms to be shortened, rethreaded and crowned would be a much cheaper option if shorter is all you want. The difference between Armalite and DPMS is a quarter-inch from end of receiver extension to gas port.  Attached File Attached File |
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Posted: 5/9/2022 10:26:30 AM EDT
[#6]
Quote HistoryQuoted: Is your barrel toast, or do you just want a shorter tube? Most .308 barrels can easily last 4000 rounds before accuracy degrades. Removing the barrel and sending it to ADCO Firearms to be shortened, rethreaded and crowned would be a much cheaper option if shorter is all you want. I just want a shorter and lighter barrel. Currently it's a heavy match 24 inch. I thought about turning and shortening it but since it's not easily replaced I'll just get another barrel. |
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Posted: 5/9/2022 10:30:48 AM EDT
[#7]
Quote HistoryQuoted: Both of these, and you don't need a new bolt or BCG if your barrel properly gages with GO, NO-GO, and Field. The difference between Armalite and DPMS is a quarter-inch from end of receiver extension to gas port. https://www.ar15.com/media/mediaFiles/18978/armalite_DPMS_AR_308_gas_lengths_png-2377502.JPGhttps://www.ar15.com/media/mediaFiles/18978/Armalite_v_dpms_308_gas_systems_png-2377501.JPG I have the gauges so I'll order a barrel and check it. Interweb searches say they use different barrel extensions but I don't see companies reinventing a barrel extension. |
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Posted: 5/9/2022 10:48:46 AM EDT
[#8]
Quote HistoryQuoted: Interweb searches say they use different barrel extensions but I don't see companies reinventing a barrel extension. I've got shortened Armalite-Walther barrels, Satern, Criterion, etc, with mixed bolts (Armalite and LMT). NOTE: If your rail is Armalite-length you may have to go to a low-profile gas block, as the DPMS-length gas tube is a quarter-inch shorter. Or you'll need to trim the Armalite rail or tube. I use an SLR or Midwest rail if I'm using a DPMS-length, so the next time I can use either Armalite OR DPMS, depending on who has a good price for the next change. Armalite with rifle-length gas Criterion 16-inch, SR-25 hybrid taper:  Attached File |
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Posted: 5/9/2022 10:59:30 AM EDT
[#9]
There is a difference between a ArmaLite bolt and a DPMS bolt when it comes to the dimension that affects headspace, and the barrels are reamed accordingly. Those dimensional differences ranged from 0.004" to 0.008", based on measurements that I and some other members took.
Forster .308 headspace gauge dimensions from the datum as follows. "NO-GO" dimensions vary and are set by the manufacturer, there is no SAAMI spec for that dimension: GO 1.630" NO-GO 1.634" Field 1.638" A ArmaLite bolt could pass a "NO-GO" gauge test on a short reamed DPMS barrel, depending on whose gauge and it's length. There are barrel makers that will cut a ArmaLite chamber for you, but it's always best to send in your stripped bolt. |
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Posted: 5/9/2022 12:31:28 PM EDT
[#10]
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Posted: 5/9/2022 1:35:39 PM EDT
[#11]
Quote HistoryThanks but it seems they are out of that barrel. I logged in to purchase it Saturday and is shows back ordered. |
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Posted: 5/9/2022 1:51:05 PM EDT
[#12]
Weird. It shows 3 in stock right now. Oh well.
Edit: Now it gone….. weird….. |
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Posted: 5/9/2022 2:10:17 PM EDT
[#13]
Quote HistoryQuoted: Thanks but it seems they are out of that barrel. I logged in to purchase it Saturday and is shows back ordered. Quote HistoryQuoted: Thanks but it seems they are out of that barrel. I logged in to purchase it Saturday and is shows back ordered. I don't know what you are looking for but since you said 24 inch I assume it's a T barrel. I replaced my T barrel which was a SS L-W and it was amazingly accurate. I went with their 18 inch .308 CM polygonal with LiFe HD, they are in stock now. The gas block area is .875 so you can use the gas block from your old barrel. You can sell the bolt that comes with it for about $90 and knock the price down some. That's what I did... In stock 18 inch Lothar Walther barrel |
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Posted: 5/9/2022 9:09:11 PM EDT
[#14]
I see the 18 barrels are offered in both rifle and mid length gas systems. Any preference?
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Posted: 5/9/2022 9:14:08 PM EDT
[#15]
Quote HistoryQuoted: Weird. It shows 3 in stock right now. Oh well. Edit: Now it gone….. weird….. Yeah it's strange. On my phone it said in stock and when trying to check out it said it was a restricted item....  WTF? On my computer it said in stock but when logged in it showed on back order.
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Posted: 5/9/2022 10:08:46 PM EDT
[#16]
Quoted: I see the 18 barrels are offered in both rifle and mid length gas systems. Any preference? I'd go longer. Armalite did 18" barrels with rifle gas at some point and some other companies do rifle gas on 16" 308's. As mentioned before you could probably chop yours and be fine. Quoted: Yeah it's strange. On my phone it said in stock and when trying to check out it said it was a restricted item.... WTF? On my computer it said in stock but when logged in it showed on back order.Might be worth a call to them. Could just be a jacked up website. |
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Posted: 5/9/2022 10:14:31 PM EDT
[#17]
Quoted: I have a armalite ar10b and I want a new barrel for it. I was looking for an 18 inch (currently a 24 inch) but short of having one custom made I can't find any. I see plenty for the DPMS style. Can you use a DPMS style bolt in the armalite carrier or an entire DPMS BCG in the armalite upper and use a DPMS style barrel? I wish I could go to armalite for the barrel but they have very few parts in stock. Thanks Lothar Walther |
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Posted: 5/10/2022 8:17:49 AM EDT
[#18]
Quote HistoryQuoted: I see the 18 barrels are offered in both rifle and mid length gas systems. Any preference? Rifle length every time… |
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Posted: 5/13/2022 7:17:42 PM EDT
[#19]
Stumbled upon this
And remembered this thread. |
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Posted: 5/13/2022 9:23:38 PM EDT
[#20]
Quote HistoryThanks. I just finished putting my new barrel on 20 minutes before checking out arfcom.  I bought a Criterion M118 Hybred 18 inch. I have one of thier barrels on a AR15 and I am happy with it so I thought I would try one in .308.
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Posted: 5/14/2022 2:36:58 AM EDT
[#21]
Quote HistoryQuoted: Thanks. I just finished putting my new barrel on 20 minutes before checking out arfcom. I bought a Criterion M118 Hybred 18 inch. I have one of thier barrels on a AR15 and I am happy with it so I thought I would try one in .308.Quote HistoryQuoted: Thanks. I just finished putting my new barrel on 20 minutes before checking out arfcom. I bought a Criterion M118 Hybred 18 inch. I have one of thier barrels on a AR15 and I am happy with it so I thought I would try one in .308.Was the barrel and extension made for an Armalite or was it DPMS style? Mind if I ask approximately what it cost? |
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Posted: 5/14/2022 2:55:01 AM EDT
[#22]
Quote HistoryQuoted: Was the barrel and extension made for an Armalite or was it DPMS style? Mind if I ask approximately what it cost? It was a DPMS style. I checked headspace with my AR10 bolt and it falls within spec. I paid 309 for it. |
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