Colt M4/ AR-15 experienced users, Does this look normal ?

Colt M4/ AR-15 experienced users, Does this look normal ?

This is a discussion on Colt M4/ AR-15 experienced users, Does this look normal ? within the General Firearm Discussion forums, part of the Related Topics category; Hey Fellas, I noticed some wear in my upper receiver, I'm not jumping to conclusions.. Just wondering if it looks normal, the BCG is still ...

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Thread: Colt M4/ AR-15 experienced users, Does this look normal ?

  1. #1
    Senior Member Array Sap03's Avatar
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    Colt M4/ AR-15 experienced users, Does this look normal ?

    Hey Fellas, I noticed some wear in my upper receiver, I'm not jumping to conclusions..
    Just wondering if it looks normal, the BCG is still looking new. Under 1000 rounds, using Frog lube.

    M4 upper.jpg
    bcg1.jpg
    bcg2.jpg

    opinions ?


  2. #2
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    Array buckeye .45's Avatar
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    What's the rifle make/model?

    Is it a build? Or was it bought as a complete rifle?

    Can you get a better pic of the wear? Perhaps from the open side of the upper?
    Fortes Fortuna Juvat

    Former, USMC 0311, OIF/OEF vet
    NRA Pistol/Rifle/Shotgun/Reloading Instructor, RSO, Ohio CHL Instructor

  3. #3
    Distinguished Member Array hardluk1's Avatar
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    Don't see anything anything odd in the second and third photo , First one looks like kinda cheesy. . Something we are missing in the photos.

  4. #4
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    Where exactly are you seeing wear marks?
    "In matters of style, swim with the current; in matters of principle, stand like a rock." Thomas Jefferson


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  5. #5
    Member Array TDH1961's Avatar
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    Look at your fired cases and see if there is any marks on the cases if so you have a timing problem and need to replace your buffer spring. Are you shooting mostly brass or steel case. If you are using reloads are they to hot? If you are using the same ammo pretty much all the time see if there is a recall on it. Think it was Winchester had a recall on 223 where they had to much propellant in them. It hard to really tell what's going on without more info and pics. Take your BCG and extend the bolt all the way out and place it bolt down on a flat level surface and if the bolt goes back into the BCG your gas rings are worn out. Like I said need more info before I could really say what you need to do but the wear I see is not normal.

  6. #6
    Member Array the6shooter's Avatar
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    I do see way more grease than needed. AR's are supposed to run wet, as in oil. dirt / sand loves to stick to grease.
    I get down in the dirt with mine, and use oil.
    Dirt and sand can eat up aluminum.
    My 2 cents.
    5lima30ret likes this.

  7. #7
    Distinguished Member Array 5lima30ret's Avatar
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    Based on the pics provided I don't see anything to be alarmed about. I agree with the 6shooter AR's run much better on oil (preferably synthetic) than a grease based lube especially in a sandy/ dirty environment. Good luck!
    Retired Police Lieutenant, Retired USAF Reserve, Glock Armorer, NC CWP, HR-218 Qualified
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  8. #8
    New Member Array Haroon525's Avatar
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    Yes, it is looking normal.

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