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Thread: Trapdoor carbine front sight base dimensions needed

  1. #1
    Boolit Mold
    Join Date
    Mar 2013
    Posts
    4

    Trapdoor carbine front sight base dimensions needed

    [SIZE=4][/SIZE]
    Compadres,
    I am in the process of turning a butchered trapdoor rifle into a modified replica carbine. Can someone out there mike the dimensions on the front sight base on their '73 carbine? It looks like an easy part to make with a file. My plan is to solder on the base and use a dovetail cut in the top to hold a front sight. Then I can more easily correct for height and windage. Thank you for your time.

  2. #2
    Boolit Buddy

    Join Date
    Sep 2012
    Location
    Las Vegas
    Posts
    462
    The base dimensions off my 1878 Carbine:
    length; .400
    width at base .300
    base radius for a .750 barrel dia is .375
    top width; .220
    height ; .220 this is looking at the front of the base. It is trapezoid with the .375 radius base
    the sight blade width on mine is .087 -.00 +.003 with the cross pin hole .160 or so above the base leg
    cross pin dia; .087 My blade slot is cut quite deep, more than I would cut it if I were duplicating it.

    your sight blade height will vary with type of rear sight, I have the carbine Buffington unit with the "C" stamp, so its correct for the 1878 rifle I have.

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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