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ARs with no sear block?

Discussion in 'Rifle Country' started by birdv, Oct 14, 2004.

  1. birdv

    birdv Well-Known Member

    I though only prebans had no sear block.

    Is this true????????????????
  2. Zak Smith

    Zak Smith Moderator Staff Member


    Colt put a sear block in some rifles to prevent installation of an auto-sear.

    The block is not required by any law, and no other AR manufacturer puts them in.

  3. chink

    chink Well-Known Member

    I have been told that the bushmaster lowers have a portion which is unmilled that effectively acts as a sear block. I think several manufactures do this.
  4. Wildalaska

    Wildalaska member

    What difference does it make

  5. glocksman

    glocksman Well-Known Member

    It makes a lot of difference if you're trying to install 'da switch'. :evil:
  6. Wildalaska

    Wildalaska member

    If ya aint Class 2 ya cant put da switch in anyway

    If you are Class 2 who cares about the block

  7. ny32182

    ny32182 Well-Known Member

    I don't know about this, AFAIK Colt is the only one that insists on a sear block. The "shelf" in my Bushies and LMT look the same height to me. There are a couple of differences that I was surprised to find. The LMT has no small hole in the front pivot pin detent spring channel like there is on Bushmaster, and a portion of the right wall of the receiver is thicker on the Bushmaster. Not sure what thats about. I would think the LMT would be mil-spec without the autosear pinhole, and thats it.

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