M5 Pistol Buffer tube?

Was on my lunch break a couple days ago and checked out a local shop I hadn't been into. They happened to have this Aero M5 lower and I had been thinking about putting together a AR-10 for deer, coyote, target shooting, and elk (if I ever get drawn). So I bought it and when I get home I notice it appears to have a pistol buffer tube. Can anyone confirm this is a pistol buffer tube? If so I'll have to change it to run a Magpul PRS Lite stock, correct? Thanks in advance.

Was on my lunch break a couple days ago and checked out a local shop I hadn't been into. They happened to have this Aero M5 lower and I had been thinking about putting together a AR-10 for deer, coyote, target shooting, and elk (if I ever get drawn). So I bought it and when I get home I notice it appears to have a pistol buffer tube. Can anyone confirm this is a pistol buffer tube? If so I'll have to change it to run a Magpul PRS Lite stock, correct? Thanks in advance.