M4 CQB Inner barrel length?

[Twin#1[Op-for]]

Title explains it, for some reason, I can't find it for the life of me. Specifically the 10.5' M4 outer barrel. I know it should be Sub-300mm, but is there a specific length that will take it right to the flashhider? Thanks

[fleuryfighter]

google 10.5 inches to mm

[Thenooblord]

exactly 300mm

[Twin#1[Op-for]]

Well yes, but is the inner barrel always exactly the same as the outer? I was under the impression that there is a greater distance to the hop-up than what the outer barrel is.

Originally Posted by Thenooblord

exactly 300mm

Ok thanks!

[ILLusion]

Originally Posted by Thenooblord

exactly 300mm

Not always. A TRUE CQB-R has a 10.3" outer barrel. Most airsoft "CQB-R"'s are 10.5.


Thus, depending on your build, the inner barrel may actually be shorter.