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Thread: Mossberg M4D operation

  1. #1
    Boolit Buddy
    Join Date
    Jan 2008

    Mossberg M4D operation

    I recently purchased a 40s or 50s vintage Mossberg M4D 4 power telescope. It is in beautiful condition, and the rubber eyepiece is like new. It is clear and required only a minor cleanup to look mint. It also has a Weaver 22 tip off mount and I planned to use it on one of two .22 rifles. On the foward end it has a small oval plate with a small common screwhead on it. The seller told me that it was to adjust parallax if any was present. He claimed he did not know how it worked however. I hope one of you that knows more than I do, can tell me if that is accurate and if so how do you perform that task. Secondly, can I remove the plate by removing the small screw so I can change the mount as it seemingly won’t come off without removing it. At 83 years of age I have learned not to screw around with things until I as least have some idea of what I am doing. That situation applys here. The little scope is in such good shape. If any of you can help me with this I would really appreciate it. Thank you in advance.............Catch

  2. #2
    Boolit Master
    Join Date
    Jan 2009
    30 miles South of Cheyenne, unfortunately
    I suggest you go over to RimFireCentral, go to the Mossberg forum and do a search for Mossberg M4D. You should find all the information you need.

    There is a discussion about the scopes, albeit quite old.
    There are 550 million arms in worldwide circulation. This is 1 firearm for every 12 people on the planet. The only question is , HOW DO WE ARM THE OTHER !!? The Lord of War.

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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