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I have been searching for a thread I read a while back about AR15 and 308ARs parts that are inter changeable with out any luck. 
With this said My understanding is the parts below are inter changeable, please ad or correct me if wrong. 


gas block 

gas tube

this is all I can think of, input is appreciated.   



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Mostly correct. Armalite used some slightly longer gas tubes if I'm not mistaken, and a few barrel manufacturers copied their gas port position. DPMS stuck with standard AR15 stuff. Most of the time you won't know unless you call and actually get a tech on the phone who has a clue, or you get it and measure. 


Also, if you ever shoot cheap milsurp 7.62, some of the AR15 triggers might not reliably pop primers. I had a timney AR trigger in my 308 and it was just dimpling some ancient surplus I had, but worked fine on good ammo. 

Edited by blue109
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