Page 3 of 3 FirstFirst 123
Results 21 to 30 of 30

Thread: Rifle Kits from M&A Parts Inc.?

  1. #21
    Join Date
    Dec 2008
    Location
    United States of America
    Posts
    201
    Feedback Score
    0
    Quote Originally Posted by Quib View Post
    I could be wrong, but I don’t think that disconnector was stamped from both sides. Punched from sheet steel might be a better term. It does appear to have an excessive amount of flash though, and doesn’t appear to have been cleaned up at all before being parked.

    With the demand placed on manufacturers these days, I think this lack of QC has been pretty common.
    I just realized you can't see in my photos, but that's a groove (valley?) all the way around the disconnector. It's not just a single ledge like it was stamped from one side.
    When preparing to engage in a battle of wits, it's best to ensure you're using quality ammunition.

  2. #22
    Join Date
    Jun 2006
    Posts
    1,100
    Feedback Score
    0
    Quote Originally Posted by M4tographer View Post
    I just realized you can't see in my photos, but that's a groove (valley?) all the way around the disconnector. It's not just a single ledge like it was stamped from one side.
    Is it? From the shadows, it appears to be flash material that was bent over during the stamping process. Hard to tell sometimes without actually having the part in ones hands.
    “A leader is best when people barely know he exists, when his work is done, his aim fulfilled, they will say: we did it ourselves.” -Lao Tzu


    http://quibphotography.com/

  3. #23
    Join Date
    Jun 2006
    Posts
    1,100
    Feedback Score
    0
    This part indicated below, is what led me to believe was material folded over and sheared off during the stamping process.

    “A leader is best when people barely know he exists, when his work is done, his aim fulfilled, they will say: we did it ourselves.” -Lao Tzu


    http://quibphotography.com/

  4. #24
    Join Date
    Oct 2008
    Location
    oregon
    Posts
    7,126
    Feedback Score
    7 (100%)
    Quote Originally Posted by M4tographer View Post
    I just realized you can't see in my photos, but that's a groove (valley?) all the way around the disconnector. It's not just a single ledge like it was stamped from one side.
    if you send it to me i can have it tested to find out exactly what it is.. i'll even send it back, with a little burn on one side.

    i have a couple barrels that are going in for GC-MS analysis in the next week or two (as soon as i can get away from work), i can take it in at the same time if we're all really curious.

    i really don't think it's a stamping.. stamping "flash" is generally only on one side, where it was stamped through the sheet- this gas got to be either MIM or cast. or alien technology that'll release a plague and kill all mankind if it's nature is revealed.

  5. #25
    Join Date
    Jun 2006
    Posts
    1,100
    Feedback Score
    0
    Quote Originally Posted by bkb0000 View Post

    i really don't think it's a stamping.. stamping "flash" is generally only on one side, where it was stamped through the sheet- this gas got to be either MIM or cast.
    I’m not going to claim to be anything close to a manufacturing process expert, but is there a procedure that basically pinches a part from sheet material, verses stamping?
    “A leader is best when people barely know he exists, when his work is done, his aim fulfilled, they will say: we did it ourselves.” -Lao Tzu


    http://quibphotography.com/

  6. #26
    Join Date
    Jul 2006
    Posts
    4,922
    Feedback Score
    4 (100%)
    I see no reason to MIM a disconnector. It would literally cost more than one made by the stamping process and produce a part that would not endure any length of time. The hook is a highly stressed area. I have seen over-hardened disconnectors shatter like glass at the hook.
    Last edited by Heavy Metal; 09-18-09 at 22:47.
    My brother saw Deliverance and bought a Bow. I saw Deliverance and bought an AR-15.

  7. #27
    Join Date
    Oct 2008
    Location
    oregon
    Posts
    7,126
    Feedback Score
    7 (100%)
    Quote Originally Posted by Quib View Post
    I’m not going to claim to be anything close to a manufacturing process expert, but is there a procedure that basically pinches a part from sheet material, verses stamping?
    could be- i'm also no expert, but i do know that flat stamping is an extremely efficient wat to make a lot of small, flat parts very quickly and cheaply. pinching the part would more closely resemble forging than stamping

    a MIM disconnector would be such a piece of shit... hah.

  8. #28
    Join Date
    Dec 2008
    Location
    United States of America
    Posts
    201
    Feedback Score
    0
    I just looked at it again and it's really strange. The other side of the 'gap' in it isn't as pronounced and looks more like it was ground down for the finish. There is a rounded side like it was stamped, but the rough portions are what baffle me. It's almost as if the stamp didn't go all the way through and the rest of it broke off. At any rate, the contact portions and the edge being at a bevel aren't real comforting.

    bkb, I'll send it to ya but I don't expect it back. I'm sure not going to use it.
    When preparing to engage in a battle of wits, it's best to ensure you're using quality ammunition.

  9. #29
    Join Date
    Oct 2008
    Location
    oregon
    Posts
    7,126
    Feedback Score
    7 (100%)
    Quote Originally Posted by M4tographer View Post
    I just looked at it again and it's really strange. The other side of the 'gap' in it isn't as pronounced and looks more like it was ground down for the finish. There is a rounded side like it was stamped, but the rough portions are what baffle me. It's almost as if the stamp didn't go all the way through and the rest of it broke off. At any rate, the contact portions and the edge being at a bevel aren't real comforting.

    bkb, I'll send it to ya but I don't expect it back. I'm sure not going to use it.
    the way you describe it right now is actually classic stamping.. the rough spots that look like its where it "broke away" is exactly what it is- its where the metal pulled away as the stamp bashed through it.

  10. #30
    Join Date
    Dec 2008
    Location
    United States of America
    Posts
    201
    Feedback Score
    0
    Quote Originally Posted by bkb0000 View Post
    the way you describe it right now is actually classic stamping.. the rough spots that look like its where it "broke away" is exactly what it is- its where the metal pulled away as the stamp bashed through it.
    Ah, gotcha.
    When preparing to engage in a battle of wits, it's best to ensure you're using quality ammunition.

Page 3 of 3 FirstFirst 123

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •