As said, all the parts play their role. On mine I had an Armalite brake and gas tuned, then later put in a LW BCG, Taccom light weight buffer and TTI spring. Definitely dipped. Retuned gas, dip lessened a bit, retuning brake was still needed though.
Your BCG was the pricey part, IMO go the rest of the way, you should be happy where it takes you.