Gas tube off centerline AR 15 and AR308

[Albroswift]

Hello, All

Can't get out to the shop and check right now, anyone know off the top of their head what the difference from centerline is between 308 and 223 gas tube hole in receiver?

Thanks--

Al

[98Z5V]

I don't have the direct number, but a pic.  I can pull out some gas tubes and set this up, and measure that, if you need it. 

[msgriff]

I believe these are the dimensions you're asking for:

[98Z5V]

^^^  That's it right there.  0.783" centerline on an AR15, to 0.845" centerline on the .308AR platform.  Well done, man.  

[Albroswift]

Thanks,  @msgriff

Exactly what I wanted.

Kinda funny that some the most commonly built guns have no drawings online of the uppers.