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8/25/2014 4:51:53 AM EDT
I bought one of these and it looks great. Anyone built an upper using this barrel?  Which gas block did you use?

http://www.redbarnarmory.com/RBA-16-M4-1-9-p/rba16m419.htm
8/25/2014 6:57:11 AM EDT
[#1]
.750" is stated in the specs...any brand will do
8/25/2014 12:06:47 PM EDT
[#2]
I have used these several times and they seem to be sufficient for a budget build.  Assuming you are going budget build on an $80 barrel.



8/25/2014 2:03:23 PM EDT
[#3]
Thanks for the answers. I'm doing a budget build. I'm sort of lookin pg for a block with a rail. Any suggestions from the hive?
8/25/2014 4:13:46 PM EDT
[#4]
Lets try again,




there are others but again this works solidly and wont break the bank.  
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