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Thread: Which Lyman rear peep sight for 1977 Investarms 58 cal ML?

  1. 08-02-2023, 01:50 PM #1
    oscarflytyer
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    Which Lyman rear peep sight for 1977 Investarms 58 cal ML?

    I have a 1977 made Investarms 58 caliber ML. Looking at adding a receiver peep sight. I see both the Lyman 57 SML and 57 GPR sights listed, for a couple different Hawkins rifles. Anyone happen to know which one of the sights would fit the Investarms 58 properly? I can't tell from the Lyman rifle models they list the sights for. TIA
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  2. 08-02-2023, 02:12 PM #2
    1Hawkeye
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    If I remember right it takes the same as a t/c hawken the gpr is for the lyman great plains rifle.
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  3. 08-02-2023, 02:53 PM #3
    LAGS
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    Both the TC and GPR use the same rear tang mounted sight.
    But the sight for the GPR comes with a wedge shape plate to make the sight fit the steeper angle of the GPR which is a greater angle down than the TC Hawken tang.
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  4. 08-02-2023, 10:09 PM #4
    KCSO
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    I just sold one and it had the same rear sight as a savage 99, and a Lyman 17a front.
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  5. 09-10-2023, 09:37 PM #5
    Woodnbow
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    The investarms is the same rifle as the Lyman isn’t it?
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  6. 09-12-2023, 10:10 AM #6
    Jackrabbit1957
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    Investarms is the manufacturer of the Lyman plains rifle line, the GPR is in that line.
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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