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Size of a sight blank

Discussion in 'Gunsmithing and Repairs' started by orpington, Jun 7, 2014.

  1. orpington

    orpington Well-Known Member

    Is there a table somewhere that lists the size of a dovetailed sight blank that would fit a particular rifle? Or, are they standardized? Specifically for a Husqvarna Model 1100 and a Winchester 1886.
  2. olafhardtB

    olafhardtB Well-Known Member

    I am a clumsy, unskilled dumb ass but I can file a dovetail to fit all I have replaced have come to large. You use a flat file on the piece and a triangle on the hole. Traditionally the piece and hole are a smidgen wider on the right so the piece slides in from the right. A little cold blue helps. The most common size on rifles is 3/8 inch.
  3. orpington

    orpington Well-Known Member

    3/8 seems standard, but would something like Husqvarna be metric since it is Swedish?
  4. rcmodel

    rcmodel Member in memoriam

    Get a ruler.
    Measure the bottom of the barrel dovetail.
    Eyeball it from the side.

    Is it about 3/8", or not?

    As olafhardtB said above.
    You will probably have to fit the sight to the existing dovetail by filing some off the bottom of the sight anyway.

    Bigger is good!
    Smaller is impossible.

  5. olafhardtB

    olafhardtB Well-Known Member

    If it ain't 3/8=0.375" it's probably 9mm=0.351" and it will have to be filed down any way. I actually just start with a piece of 1/2×1/8 flat steel from the hardware store. File on it until the end fits the groove and then cut the peice off. This gives me a handle while I file. If you drill and tap this little piece, you can put a screw in it to make a flat post sight. I use white nylon screws that cut down to great thick woods sights but are a pain to use against paper. Blued steel, brass or shiny steel can be used and the threads hold paint real good. This kind of sight is crudely adjustable. The screw can lock the piece in. Locktight is good too.

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