I don't know about a few things but they are minor…. troy battle rail is good… but, and I may be wrong, not sure you want the armalite pattern with the maten, you may need dpms… you also have a dpms bolt carrier assembly with a rainier ultramatch, awesome choice in barrel but it needs to have the dpms extension to match your bolt carrier assembly, armalite and dpms won't jive very minor things that will be easy to fix, nice start to a sweet rifle.