I've been searching around and can't seem to find an answer to my question, so here it is. I'm currently changing some things up with my factory DPMS LR 308 AP4, and decided to change the carbine barrel to a SASS barrel. Well, I need to upgrade my gas tube to mid length when I make the swap. My question is can I use a AR 15 mid lenght gas tube on my LR 308 with my new SASS barrel? I'm just not sure if there's a difference between the gas tubes on a 308 ar and a AR 15. Any help getting this sorted out would be greatful. Thanks in advance.