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home Forums – The GUN Forum Firearms My friend is looking for help identifying this “crack”. He says it’s visible on both sides. Is this a possible cold shut, or is it even worth the concern?

  • My friend is looking for help identifying this “crack”. He says it’s visible on both sides. Is this a possible cold shut, or is it even worth the concern?

    Posted by Arianna on November 11, 2021 at 1:51 am

    My friend is looking for help identifying this “crack”. He says it’s visible on both sides. Is this a possible cold shut, or is it even worth the concern?

    Arianna replied 9 months, 1 week ago 2 Members · 1 Reply
  • 1 Reply
  • mcmarkerson

    Guest
    November 11, 2021 at 1:51 am

    If it were me, I’d contact the manufacturer and ask them with that same picture. I’m sure there is a warranty on that lower

  • skippythemoonrock

    Guest
    November 11, 2021 at 1:51 am

    Visible on the inside?

  • velocitystackup

    Guest
    November 11, 2021 at 1:51 am

    A bit of a wild guess, but I’m guessing it’s a DPMS rifle. Unfortunately DPMS went bankrupt and got bought by PSA. You can ask DPMS if they will warranty the old pre-bankruptcy rifles but I wouldn’t hold my breath.

    I don’t think it’ll cause any serious issues, but worst case scenario you get a new stripped lower and move the parts over. PSA has new lowers for roughly $60.

  • Pooneapple

    Guest
    November 11, 2021 at 1:51 am

    You: *draws over third hole*
    ATF cuck: you’re safe for now

  • NotAGTCSockPuppet

    Guest
    November 11, 2021 at 1:51 am

    I am in the “just buy another lower” camp.

  • OutHereTrappin

    Guest
    November 11, 2021 at 1:51 am

    That would be unsat for me.

  • ilikerelish

    Guest
    November 11, 2021 at 1:51 am

    Too bad there isn’t an inside shot of the same side. I would be curious to see what it looks like without finish applied. It kind of looks like a scar that got finished over (blem). Though if it is a casting/forging error, that left a crack running all the way through, or even if it was cracked by cooling too fast or some such thing, the gun will fire safely. All of the pressure is contained by the bolt and barrel extension. The lower’s only real contribution is to hold all the parts in correct orientation to function. It takes none of the breach pressure. If this is a 5.56 or similar, I would suspect that it will still last you a lifetime. If it is something with a bit heavier recoil it may become an issue at some point. As others have said, you can easily replace the lower for cheap if you want. Worst case scenario, if you had to keep this one for sentimental or other reasons you could take it to a fabricator and have it welded. and cleaned back up on a mill.

  • Brave_Development_17

    Guest
    November 11, 2021 at 1:51 am

    Looks to more of a tooling mark or scratch.

  • red_kimi

    Guest
    November 11, 2021 at 1:51 am

    Definetly not cool, but I don’t think a lower takes that much energy from a discharge to be a problem.
    $.02

  • 57_guy

    Guest
    November 11, 2021 at 1:51 am

    Disassemble. Oil heavily. Let sit. Wipe off all oil, really, all of it. Try to flex by pushing pulling to get crack to open. Does the flexing let oil out of crack? Then there is a crack. No oil? MAYBE there isnt a crack. Chance of false positive is very low. Chance of false negative is low as body is aluminum.

  • trogger13

    Guest
    November 11, 2021 at 1:51 am

    My two cents is it looks like a scratch, breakdown and take well lit photos of the other side.

  • Purple_Calico

    Guest
    November 11, 2021 at 1:51 am

    No concern.

  • hpsctchbananahmck

    Guest
    November 11, 2021 at 1:51 am

    I just can’t imagine that will lead to any major issues

  • Oneshoeleroy

    Guest
    November 11, 2021 at 1:51 am

    If he’s worried just get a new lower. It’s a 50-75 dollar fix.

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