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6/10/2012 4:08:49 AM EDT
I built a AR308 from a kit ,I am tring to upgrade the free float handguard from the heavy alum handle to a carbon fiber handguard. I purchased a DPMS carbon fiber kit  for the 308 and cannot install the barrel nut from the kit unto my upper. Is there differant a  thread pitch used on the uppers ? I can start the nut but it only goes on a few threads. And  where can i purchase another barrel nut . The kit is built on a DPMS lR308 lower .
6/10/2012 5:23:08 AM EDT
[#1]
You might want to contact DPMS?
6/10/2012 1:44:04 PM EDT
[#2]
Quoted:
I built a AR308 from a kit ,I am tring to upgrade the free float handguard from the heavy alum handle to a carbon fiber handguard. I purchased a DPMS carbon fiber kit  for the 308 and cannot install the barrel nut from the kit unto my upper. Is there differant a  thread pitch used on the uppers ? I can start the nut but it only goes on a few threads. And  where can i purchase another barrel nut . The kit is built on a DPMS lR308 lower .


Yes Armalite is different than DPMS. You can't mix and match on this part.
6/10/2012 1:47:21 PM EDT
[#3]
Whose receivers are you using?
6/10/2012 3:52:57 PM EDT
[#4]
I am not sure who,s receiver it is. I purchased the kit from Blackthorneproducts.com they had 2 kits one for DPMS lower and One for Armalite lower. I got the one for the DPMS. The free float tubes they sell have       1 7/16"x18 threads
6/11/2012 12:34:48 PM EDT
[#5]
Quoted:
I am not sure who,s receiver it is. I purchased the kit from Blackthorneproducts.com they had 2 kits one for DPMS lower and One for Armalite lower. I got the one for the DPMS. The free float tubes they sell have       1 7/16"x18 threads


Do yourself a favor and do a search on here for Blackthorne.  They're a pretty shady company with less than ideal quality control.  I would try to get your money back and go elsewhere.

6/11/2012 5:56:42 PM EDT
[#6]
if its not to late return the kit and take the fee for restocking as a lesson. those guys ripped me off bad i bought 3 upper and none of them were worth a dime.
6/11/2012 7:23:29 PM EDT
[#7]
OP, did you purchase the full rifle kit?
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