Our QC standards are the same on all products we make. Govt/L.E models will only get special attention if they are full autos. The finish is not important as long as it meets the spec. Whether it be a little purple or not doesn't make it non mil spec. The Hard Anodized finish will last the life of the rifle (as long as it is maintained properly) whether it is purple, black,grey, or pink. Military & L.E. don't care what color they are as long as they work 100%.
"I just bought a M4 upper and the barrel needed re-indexing. I sent it back to Bushmaster and they re-indexed. When I took my upper apart to send it out to get refinished I noticed how they did it, they ground off half of the indexing pin, now I can twist my barrel side to side.
Are you saying Bushmaster ground off half of the index pin to fix it & your barrel moves side to side?
If that is what you are saying I would love to take a look at that upper. The way we fix an indexing issue here is to drill out the old index pin, replace it & re-torque. There is no way we would grind an index pin down, that defeats the whole purpose of a tight fit between the index pin & index slot in the receiver. I'm very interested in your reply!