DLC Bolt Carrier Group - Sharps Rifle

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    Q

    qorban88

    Active Member
    Jan 11, 2015
    106
    Anyone have experience with DLC (Diamond Like Carbon) coating for BCG's, particularly this from Sharps Rifle Company?

    https://www.srcarms.com/shop/specials/sharps-308-relia-bolt-carrier-group-complete/

    or this https://www.armorally.com/shop/toolcraft-dlc-308-bolt-carrier-group/?v=7516fd43adaa

    https://www.youtube.com/watch?v=DKorzrhUyDs

    I know Nib is a no go and Nitride is questionable, so I'm looking for the next best thing... I guess.
     
    Last edited:
    O

    omegared24

    Ultimate Member
    Dec 23, 2011
    4,747
    Ijamsville, MD
    qorban88 said:
    Anyone have experience with DLC (Diamond Like Carbon) coating for BCG's, particularly this from Sharps Rifle Company?

    https://www.srcarms.com/shop/specials/sharps-308-relia-bolt-carrier-group-complete/

    or this https://www.armorally.com/shop/toolcraft-dlc-308-bolt-carrier-group/?v=7516fd43adaa

    https://www.youtube.com/watch?v=DKorzrhUyDs

    I know Nib is a no go and Nitride is questionable, so I'm looking for the next best thing... I guess. I also know you can't go wrong with phosphate and carpenter 158, but I've been having issues with my suppressed AR308. The adjustable gas block doesn't seem to help.
    Click to expand...

    I'll venture to guess that if it's a phosphate BCG, it's not the coating. You may want to gauge that current BCG and make sure it's good.
     
    Q

    qorban88

    Active Member
    Jan 11, 2015
    106
    All gauges check out, including head space. I know the coating won't be the only cause and I suspect a combination of over-gassed and possibly the ejector. Just wondering if DLC and some other improvements are worthwhile investments...?
     
    O

    omegared24

    Ultimate Member
    Dec 23, 2011
    4,747
    Ijamsville, MD
    qorban88 said:
    All gauges check out, including head space. I know the coating won't be the only cause and I suspect a combination of over-gassed and possibly the ejector. Just wondering if DLC and some other improvements are worthwhile investments...?
    Click to expand...

    Consensus on this forum is other coatings are not an improvement.

    At least you've ruled out the BCG. I'm not that knowledgeable when it comes to suppressors.
     
    outrider58

    outrider58

    Eats Bacon Raw
    MDS Supporter
    Jul 29, 2014
    50,025
    Any coating is questionable if the bolt carrier wasn't milled to accept it. You're looking at a Toolcraft BCG(in the case of the Arm or Ally product). Their claim is that all their BCGs are milled with consideration to a given treatment. They come with a lifetime warranty.
    Please Note: Some dealers utilize a third party coating service to keep their costs down. If purchasing a Toolcraft bolt carrier group from one of these dealers, Toolcraft will void the coating warranty. All Toolcraft Bolt Carrier Groups sold by Arm or Ally include the manufacturers 100% no-questions-asked warranty.
    Click to expand...
    I know nothing about the DLC as far a longevity.
     
    clandestine

    clandestine

    AR-15 Savant
    Oct 13, 2008
    37,031
    Elkton, MD
    DLC is not bad, BUT the bore specs before and after coating is VERY important.

    SRC Products are not something I would put in my own weapon though. The tapered bolt heads will peen the chamber mouth and the S7 Steel tends to not be as durable as they claim.

    Qorban88, you having trouble with one of the AR's I helped you with?
     
    Last edited:
    Q

    qorban88

    Active Member
    Jan 11, 2015
    106
    clandestine said:
    DLC is not bad, BUT the bore specs before and after coating is VERY important.

    SRC Products are not something I would put in my own weapon though. The tapered bolt heads will peen the chamber mouth and the S7 Steel tends to not be as durable as they claim.

    Qorban88, you having trouble with one of the AR's I helped you with?
    Click to expand...

    Sorry for the delay. You have advised on these guns before and I've brought it up in another thread: https://www.mdshooters.com/showthread.php?p=5582994#post5582994

    Dialing down the adjustable gas block more and swapping ejector springs with AR15 springs was suggested but i haven't troubleshot that yet. I'm just anticipating having to replace the entire BCG and wondering what would be a worthwhile upgrade. Very curious about DLC and possibly dual ejectors... https://www.armorally.com/shop/toolcraft-ar10-308-double-ejector-bcg/?v=7516fd43adaa
     
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