Looks like both are DPMS LR308 patterns so shouldn't be any compatibility issues. Personally, unless you just need a quad rail, I'd get one of the newer KeyMod rail. Much cleaner and lighter platform.
This is a 15" CMMG RKM15 MK3 rail on mine. It is cheaper than the SASS quad rail as well. No special tools except a 1 1/2" spanner wrench.