On 9/8/11 I ordered my first BCM products, a mid-length Light weight profile barreled upper, sans hand guards. I cranked on a KAC URX 3 and went to town.
Eventually I installed a KMR that I thrashed until it got all fucked up. I thrashed it hard. After running a course where I used a barricade as a rest to shoot, I bent the KMR's front profile inward. Totally got my $269 worth out of that forearm.
I never cleaned it. I lubricated it with various products, S2k EWL, Lucas Oil, Coconut oil, motor oil, basic ally anything I could get my hands on. A friend wiped it down much to my dismay around 40k rounds fired, he thought he was doing me a favor. All he did was fuck up my chances at usurping Filthy#14.
I don't remember the round count here, but it was getting there. Take note of the Geissele trigger. Another great company.
I eventually shot the barrel out after around 35k rounds fired. I rebarreled with another CHF barrel, and went right back to abusing the absolute dogshit out of it.
Only until this failure occurred did I clean this bolt carrier group.
I'm a shit photographer, but there is a near mirror-polish on the underside where the BCG rides in the upper.
The gas key, still staked--walked out. I'm not too unhappy about this. Why?
Because this happened well beyond my expectations. This BCG has seen almost 100k rounds with very little care. Nothing was replaced, nothing was tended to, I only lubed it.
I lent my rifle to friends who went to Night fighting courses, Frontsite (LOL), EAG, LMS, etc. This rifle was passed around quite a bit.
Aside from magazine related or user induced malfunctions, it ran without a hiccup.
Older picture: ignore the PA microdot, the Aimpoint I had ruined was off being repaired/replaced.
It still fires/cycles, by the way.
I am a BCM customer for life.