The sear and the rail

Discussion in 'Maintenance / Tweaks / Technical Difficulties / So' started by hiramabiff, Nov 6, 2005.

  1. hiramabiff

    hiramabiff New Member

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    [​IMG]

    As you will obeserve the pix you will notice a discoloration on the rails just on top of the firing pin [not the side rails!]. The rails I was referring to here is part that houses the firing pin and spring. I learned that this actually touches the no. 10 [sear] on the user's manual. My conclusion was that this parts should be properly oiled.

    I guess there was a question in a previous thread whether this part was safe to grind or would breach safety of the handgun.

    I guess, on my own opinion that this can be grinded slightly to the point that is does not touches the sear. The sear would not be moving much further up as it has a limitation of movement. The rail should not serve as a stopper for the sear in moving up. Sear should serve only to hold off the firing pin when cocked and release the same when trigger is pulled. But again the sear touching the rail should not be so much of a concern unless pistol has consistenly having issues of going battery or any issues resulting from it.

    This is just my opinion... do not use this to solve your issues. :wink:
    [Please do not apply my conclusions on this subject or take it at your own risk]
     
  2. theFiasco

    theFiasco New Member

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    hiramabif,

    I thought the discoloration on the inner "rails" of the slide might be
    caused by the rails rubbing the top round in the magazine as the slide
    slams rearward after firing.

    The discoloration on my M9 is brass colored.

    Just a thought.

    tF
     

  3. madecov

    madecov Active Member

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    It is brass.
    The front of the rail against the breech face is the part that "pushes" the round from the magazine into the chamber. The rails behind it slide over the top round in the magazine as it moves to the rear in recoil. Polishing the rail is not going to hurt things, grinding is not a good idea.
     
  4. FlaChef

    FlaChef Guest

    as stated the discoloration is brass, it comes off w/ cleaning. It should be oiled as it is a contact surface that creates friction. Also any burrs or knicks can be buffed out to smoothen the action.
     
  5. hiramabiff

    hiramabiff New Member

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    It is brass! :oops:

    I've just check and tried to see from the side a I inserted a magazine with load. :wink:



    where would I be without this forum? :cry:

    :wink:
     
  6. poppopkelly

    poppopkelly New Member

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    Looking for a new slide!
     
  7. hiramabiff

    hiramabiff New Member

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    Yeah, worst I have to retrieve the sandpaper that was used to grind the rails and collect the metal dust and try to put it back! :oops:

    No, I have not come to that point yet. :wink:
     
  8. hiramabiff

    hiramabiff New Member

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    You are just right.

    I was already home and holding my Steyr and remember your post. I was still telling myselft that you may not be correct and that would not be possible. Anyway, I grab my magazine with load and inserted put it in the receiver, peeped on the opening between the slide and the frame. And, there it was!

    To comfirm it further, I removed the slide and inserted back the magazine with load and measured the protruding brass as I look from the side of the frame....

    After realizing that fact, went back to my office to confirm that you were right but there it was ... too late :oops:

    I could have received some spanking for that! :wink:


    :wink:
     
  9. Deluxe247

    Deluxe247 Supporting Member

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    I had the same build up like everyone else. I ended up taking my Dremel with a polishing attatchment and buffed the rails smooth. I polished just enough so that it does not pick up any more brass now.

    This is, in my opinion, one of the main things that causes the slide not to go into full battery. That part of the slide rubbing on the rounds in the mag robs it of it's momentum during the rearward movement when cycling. The more build up you have, the more it "catches" and slows down.

    -D