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    Legacy Member drsteve's Avatar
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    1903 Drift Slide Peep Sight

    I have a question for you guys that shoot their 03's in highpower matches.

    The drift slide on my 1903 ladder sight is stamped with an X on the left and a 6 on the right. I was told or I read (can't remember which), that the Xed out part was probably marked with a 5 and enlarged to a 6 when the rifle was in re-arsenal. Unfortunately, the # 6 peep is still two small for me. My target acquisition goes all to hell after I work the bolt.

    I do have an extra drift slide that I can enlarge the aperture on. What is the best way to do this? I understand that the USMC sights had a # 10 aperture.

    Is that the same size as the peep sight on the 1903-A3; because that's too large for me? I guess I'm picky.

    Also, I don't have a drill press.

    Kind regards,

    Steve
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    When the rifle was first ussued, there were three sizes of aperture: No. 4, No. 5 and No. 6; being .040", .050" and .060" respectively. The "standard" was the No. 5. Later, the "standard" was changed to No. 6, and when rifles came in for overhaul, the No. 5 apertures were reamed out to No. 6. and remarked. The larger sizes (No. 7, 8 and 9) were added, but these "spares" were packed in the cases of ten rifles. I'm not sure how "rare" the larger sizes are, but I have only one of each in my collection ... someplace. Most WW II production apertures are a "nominal" No. 6 ... and most of those are are unmarked.

    When the 03 was THE Service Rifle at Perry, vendors sold little hand reamers that could be used to ream out the aperture to a larger size to suit the shooter's needs. I'm not sure if there was any restriction in the size of the aperture. I have the 1935 Rule Book and one from the 20's, and there is no mention of any restriction. In the latest CMPicon rule book for the "as issued" category, the aperture can be reamed out to a max of .100", which was the size of the Marine Corps aperture.

    I have used a small rat tail file from a "jewel's set to ream out the aperture; insert from the front of the sight (muzzle side) so the taper will open toward the muzzle and turn it "backwards" ... counter-clockwise. When done, dip a round tooth pick in cold blue and run it into the aperture. I find that a No. 8 size or larger works the best for my ancient eyes.

    Resp'y,
    Bob S.

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    Legacy Member drsteve's Avatar
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    Thread Starter
    Thanks Bob.

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    Legacy Member ELFEGO BACA's Avatar
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    Had question on size of hole on drift slide peep sight.
    The answer was here!

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    Legacy Member RCS's Avatar
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    number 5 on my early Springfield

    Had to check the number on my early and original 1903 serial number 160963 with a SA 2-07 dated barrel. The peep is still marked 5Attachment 119334Attachment 119335

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    Legacy Member Mike_S's Avatar
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    Looking at mine - serial for 1929 and barrel stamp matching - The peep is marked 6 on the left and R on the right. First thought would be the R is for Remington, but that's just me. Is it that, or something else?

    There are also no arsenal or personal marks on the stock, but the metal is green, I guess just because it evidently had the Parkerizing replaced, doesn't mean the same is indicated on the rifle? Am I correct in that thinking?
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    Legacy Member Mike_S's Avatar
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    So anything I read says the green/gray finish is a result of arsenal repair, and the R on the peep assembly could be indicative of arsenal repaired sight? Might kind of make sense if the rifle went in for repair of small parts and came out re-Parkerized and ready for re-issue. Only reason I am following that is because Remington stamped their milled parts with an R, and that is what is on this SA rifle.

    And... I could be so far off base as to be out in the boonies with no boat! LOL!
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    Legacy Member Mike D's Avatar
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    Mike S - Could be a USMC re-park/rebuild, who knows?
    Start a new thread, with plenty of photos, and you'll get some answers quick!

    Mike D
    Last edited by Mike D; 08-15-2021 at 09:12 PM.

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