DPMS- What is left to do to make "battle worthy"
I have been doing some searching and some reading. I have come to the conclusion that I need to make certain modifications and upgrades to my DPMS AR 15, 16" bbl m4 style rifle with the goal of maximizing reliability. I thought by adding an m16 bcg by BCM that would go a long way. I am also thinking that while the barrel has a chrome chamber, the 1:9 twist barrel is only chrome moly, not chrome plated. As I have read here, you guys swear by the chrome plated 1:7 twist barrels. While I am comfortable with the 1:9 twist (I don't want to get into that debate I am good with it) I know that the chrome plating is a big deal. Also, I was not able to determine the necessity of changing to an H buffer. No one really knows if that is necessary to increase weight if you increase the weight of the bcg by way of adding an m16 carrier.
So, to make this less confusing, the question is: What is recommended to make my DPMS "battle worthy" in the eyes of you very skilled and information-filled m4carbine members? Would you recommend just going with a chrome lined barrel? Adding an h buffer to my current rig? Going with a complete upper from bcm? Or, are my upgrades sufficient (BCM bolt carrier group, bcm large notch charging handle)? Is adding the h buffer a "no brainer" or is this a trial and error type of upgrade? I would like to know what I have left to do while I have a bit of cash now. MANY THANKS!!!