I thought I would add this post after what my BM M4 went thru yesterday. We had a small family get-together yesterday at my bother-in-laws house. He lives outside town a ways, and has a 50 yard area where he shoots. He told me to bring the "AR" out. Having 2, I deceided to only bring out the BM with 23 loaded 30 round magazines, or 690 rounds for those of you in Rio Linda. 
150 of which were loaded with Wolf steel 55 gr. The remainder was reload 55 gr. from a gun show, PMC Tiawan, Remington, American Red box and some other 62 gr. stuff. It was hot. 100 degrees. Its also Tucson -dusty. We shoot in the shade, but its still hot. Me, 2 brother-in-laws, 2 wifes, 1 cousin and a father-in-law all took turns ripping up paper targets, water cooler, 2 computer CPU's, a monitor and about a dozen 5 gallon water jugs. My brother-in-law found 2 more boxes of Wolf he had, so 40 more rounds went thru bringing the total amount shot yesterday to 730 rounds (190 Wolf) 
The result? - absolutly 100%. Not ONE single ANYTHING. Boring reliability. Like shooting Glocks. The sling melted at the front because one of the ladys was shotting it from a table rest and the sling was under the barrel. There is still a glob of sling that has permantly stuck to the underside of the barrel near the lug. At times we rapid fired it and on 2 occasions (2 magazines) I did the rubber band around the mag well full-auto trick to the point where the barrel was smoking! Great time! Cleaning on the other hand late last night? Not so fun. Very dirty. I wish I took a picture to show what this many rounds looks like in this heat a cheap ammo. Black sludge is how I can best describe the bolt. I run Mobile 1 20W 50 full synthetic in all of my firearms, and I made the bolt wet in a quick-once-over prior to going out to the in-laws. That helped I think.
I say this because I attribute this reliability to the few, simple and cheap upgrades (I believe necessary upgrades) to the rifle per Robs recommendations. This bastard can run with any of them, I trust this thing and is fun because it works. So in other words, keep your rifle. Buy another one too. The point is go out see if it works and let it rip. You maybe suprised (if its like mine) how reliable AND accurate this gun is, or can be.
"As a member of the House Intelligence Committee, I am keenly aware that the proliferation of chemical and biological weapons is an issue of grave importance to all nations. Saddam Hussein has been engaged in the development of weapons of mass destruction technology which is a threat to countries in the region and he has made a mockery of the weapons inspection process." -- Nancy Pelosi, December 16, 1998
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