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Posted: 3/2/2009 11:11:44 AM EDT
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http://i675.photobucket.com/albums/vv117/warhammer419/1stupper.jpg
http://i675.photobucket.com/albums/vv117/warhammer419/2nduppershot.jpg since i have had this upper i have noticed these spots where the coating on the inside of the upper is flaking off, the stuff that looks like paint after paint remover is all that is left. last time i cleaned the rifle when i ran the rag through there i noticed i was removing all of this coating. also coming off with the AP brush, that is when i stopped and took these pictures. i have never seen anything like this with my Colt or KAC guns. i have contacted the manufacturer 2x and they have seen fit to just ignore me, never buy from them again! any thoughts?? |
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Looks normal, and the reason that you never spray coatings inside of the receiver.
Myself, I would break out some Acetone on a Q-tip and remove the remaining coating still on the inside of the receiver, hence get the bearing parts back to just the anodizing black coat. As for the area's of the anodizing that have worn, these are normal for a rifle as it breaks in as well. Note: Acetone will only remove the spray on coating, and will not dissolved/harm the anodizing coating in any way. Really, you are just beating the CLP to the punch, since it's the cleaning agent of the CLP and the parts moving against each other that is doing the same, just in a longer period of time. P.S. Can't see the outside of the upper, so I can't tell if the coating is some sort of Teflon/Duracoat, or mag type lube spray. Either way, it was never going to hold up inside the inside of the receiver, so it should have not been applied there, or left in the first place. |
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There was something like that in my new AR-10 receiver. It wore off as I cycled the action and such - it looks like your coating is chemically breaking down though. After 40 or so shots at the range, I don't see any remaining. Do a search on "dry film".
IMO, the stuff is about as useful as the rubber whiskers on new tires. Wears off to show it's been used. 
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after some more research of my own, mil-A-8625 is the spec that i would say should govern whether the type 2 anodizing coating on an upper is "mil-spec" or not.
from what i can tell, some manufacturers don't seem too worried about meeting that standard and it sounds like most customers are content to let the coating wear off. when i spend $2000 for a rifle i would not expect the coating that is supposed to protect the metal to wear off. i like the idea of being able to change calibers in a matter of minutes, BUT after only 1500 rds i can see that this upper will wear out prematurely (note the bare aluminum) and the vendor(MGI military) has seen fit to act like it isn't a problem or even take the time to give a proper response. my only hope now is that others won't make the same mistake I did. |
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Some mfgr’s spray, then bake on a coating of dry film lube to the interior of the upper receiver. Bushmaster is one of those mfgr’s.
The coating will eventually wear or flake off over time. It’s not a big deal and in no way will affect the functioning of the rifle. |
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