Welcome from Indiana brother Dave and THANK YOU for your service.
Other things from Aero you might consider is their lower parts kit and Nickel boron BCG.
I had an issue with tolerance stacking and new parts blues on my M5 and installed Armalite parts for the recoil system. Receiver extension tube, spring, and buffer. Just my 2 mags.
For a trigger I went with a La Rue 2 stage.