Warhawke,
It is interesting that you mentioned Jessica Lynch. Personally, I feel that in their case, there was a serious lack of maintenance, and this problem exists to this day with many of the support soldiers in the Sandbox.
I used to be based in Tallil, right next to Nasiriyah. This is where Jessica Lynch was captured. I used to drive the same route her convoy took. I know where they got lost, where they fought, and where she was captured. Thus, I often reflected on what went wrong. If you read the AAR on the 507th, one thing that stands out is that these soldiers did not have their weapons properly maintained and many of them jammed or failed. Compare their failure rate to the Marine units in the same battle, and you will see that it was an isolated event for this one unit. It was not so much the fault of the weapon, but of the soldiers, their NCOs and officers.
I don’t know why, but many support soldiers have poor weapon maintenance skills. They just don’t get it. I used to watch them clear their weapons on the way into the dining facility and the majority had dry bolts. Even their officers had dry pistols slung in shoulder holsters, which btw often fell out onto the ground. You could tell which soldiers were the ones who went outside the wire, because their weapons were well maintained.
I never had any issues with my M4, which started off as a bushmaster 11.5, and later traded in for a Colt 14.5 Some of our Bushmasters had extraction problems. People make a big deal about the dust and sand in Iraq. First of all, it is not like sand as most of us know it. It is a fine dried dirt. It can be a problem during sandstorms, but those are not very common. The choice of oil is a factor, as some of them seem to attract dirt more so than others.
I have owned a HK 416 upper and though I liked it, I sold it because I could not get spare parts from HK. About this same time I started to realize that my standard DI M4 was doing its job. I will admit that the DI system does decrease the life of certain parts of the rifle. Personally, I am not looking to fix the M16, but rather move on to a modern rifle such as the SCAR or Masada.