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Thread: Trapdoor carbine sight 1879 model

  1. #1
    Boolit Master
    Join Date
    Sep 2016
    Posts
    450

    Trapdoor carbine sight 1879 model

    Just got this in the mail today. Slider wasn't moving at all. Took it apart and was full of dried grease. Put it back the way it came apart and with the two screws tight won't move at all. Loosened the two screws a half turn each and squirted some breakfree oil to lubricate things. Still no movement. Kept doing the half turn thing and the spring kept coming out of the block that sits between the ladder. So took it apart and used some 600 wet or dry silicon carbide paper to polish the bowed section of spring and hoping to remove some of the scratches. Put it all back together no joy. block moves freely between the slot in the ladder. Could it be possible that the spring with the bowed side should not face the ladder?. All of the dried out grease is gone with some Hoppe's and a fine brass brush. Sight is in excellent shape and ladder it self is not bent. Seriously don't think you'd have to loosen both screws from tight to set windage and elevation and then tighten. It is a carbine sight with C stamped on one of the ears where the elevation notches are. No need for anymore grey hair cause I like what little i have. Any all all help or suggestions are appreciated. Mods, dodn't exactly know where to put this so if you feel the need to move it feel free to do so. Thanks Frank

  2. #2
    Boolit Master
    John in PA's Avatar
    Join Date
    Jun 2010
    Location
    Hollidaysburg, PA
    Posts
    193
    Photos illustrating your problem would help. No tools should be necessary to adjust the aperture up and down the ladder slide on that sight, nor should they be necessary to raise or lower the ladder itself. Either parts have been replaced with something non-matching, or it has been reassembled incorrectly.
    John Wells in PA

    Peabody's and Peabody-Martini's wanted
    Also shoot a 10-PDR Parrott Rifle in competition

  3. #3
    Boolit Master
    Join Date
    Sep 2016
    Posts
    450
    John, dearly wish I was computer literate enough to be able to post pics. Unfortunately I'm electronically challenged. Tried oil, grease to lube the slider no good. Polished the spring no joy. Even tried to reverse the spring from having the legs either up or down no luck. Couldn't find an exploded drawing of the sight to check location of spring or that little block but what I found was extremely hard to make out. Put it on hold for now as I'm doing some major house cleaning in the garage. Frank

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check