Why does everyone keep skirting the issue?
There isn't any debate as to if a DI gun works fine, can fire thousand of rounds or can be maintained by a monkey. Thing is that no matter the lubrication status of any of the parts a DI gun is going to need much more than a wipe down after 1000+ rounds, a PD will not.
As for accuracy issues give me a break it is a fricking battle rifle not some match grade target rifle. Then again some still think it's a marketing ploy so who knows what you guys will think of next. Seriously though if you notice the accuracy differences than you shoot an assault rilfe off bags and shouldn't be in this conversation anyway.
The best part of this thread is the fact that I have both kinds of systems and only mentioned obvious pros & cons. I loved my DI wanted nothing to do with a PD AR but after buying one there is no debate as to it's advantages.