anyone know how to remove the big knob on the m-1d scope mount

[goo]

so i can adjust the offset screw and bore sight the scope?

thx,
goo


33911

[five 0]

Are you talking about the knob that screws into the barrel block?


so i can adjust the offset screw and bore sight the scope?

thx,
goo


33911

[goo]

the big knob. i needa remove it the tweek the itty bitty offset correction screw

[goo]

how do i remove the big knob?


33919

[goo]

this might explain the problem but i don't see an answer,

http://garandforum.proboards.com/thread/452/m1d-scope-alignment?page=1

[StockDoc]

are you talking about the locating pin that is next to the mount screw?

https://images.search.yahoo.com/images/view;_ylt=AwrTcXMas5VWpscAfyM2nIlQ;_ylu=X3oDMTIzZm RibWw2BHNlYwNzcgRzbGsDaW1nBG9pZAM4YjJhZjE2YzBkZTY1 Y2FhZGMxNDI2NjU5MWRmNTlmZgRncG9zAzI1BGl0A2Jpbmc-?.origin=&back=https%3A%2F%2Fimages.search.yahoo.com%2Fyhs%2 Fsearch%3Fp%3Dm1d%2Bscope%2Bmount%26type%3Dsbc_dsl %26fr%3Dymyy-t-999%26fr2%3Dpiv-web%26hsimp%3Dyhs-att_001%26hspart%3Datt%26tab%3Dorganic%26ri%3D25&w=1024&h=768&imgurl=i12.photobucket.com%2Falbums%2Fa249%2Fm1cra zy%2FM1%2520Rifles%2FDSCF0005-1.jpg&rurl=http%3A%2F%2Fforums.thecmp.org%2Fshowthread.p hp%3Ft%3D129479&size=77.2KB&name=%3Cb%3EM1D%3C%2Fb%3E+%3Cb%3EMount%3C%2Fb%3E+Q uestion+-+CMP+Forums&p=m1d+scope+mount&oid=8b2af16c0de65caadc14266591df59ff&fr2=piv-web&fr=ymyy-t-999&tt=%3Cb%3EM1D%3C%2Fb%3E+%3Cb%3EMount%3C%2Fb%3E+Que stion+-+CMP+Forums&b=0&ni=21&no=25&ts=&tab=organic&sigr=11gkgvrht&sigb=14inpphka&sigi=122rld66j&sigt=11d10h0hp&sign=11d10h0hp&.crumb=30bBLQfqhv7&fr=ymyy-t-999&fr2=piv-web&hsimp=yhs-att_001&hspart=att&type=sbc_dsl

[StockDoc]

this will probably help you some "How to set a mechanical zero on the M84"

https://www.youtube.com/watch?v=sqQrkTrWq5U

[StockDoc]

how do i remove the big knob?


33919

not a screw but a locating pin, it does not move

But I have thought about removing the pin and putting a set screw there, or a fine Diamond hone to adjust. Until then, I had good luck using this video and a laser bore sighter. https://www.youtube.com/watch?v=sqQrkTrWq5U

Hope this helps

[goo]

that was very helpful. thank you so much, stock doc.

[StockDoc]

welcome

[five 0]

how do i remove the big knob?


33919
I believe the only way to remove the knob is to mill out the round weld that has a star stamping. Of course you would have to weld the screw back to the knob after you remove the pin.

If anyone has a screw that fits in the knob or even the dimensions of the screw let me know. I have a CMP M1D mount that has the screw that has been replaced with a 5/16x28 screw instead of the 5/16x32 screw that is need for the M1D barrel block.

[JohnF]

If you are like me I can never remember the steps in a DIY 'you tube video' for more than 5 minutes :icon_lol: Here is a print out sheet of instructions if needed while fiddling with it on the work bench


Adjusting and Zeroing the M84

The M84 telescope is equipped with a post and cross-hair reticle that may confuse the shooter previously experienced with cross-hair reticles only. As some have discovered, the heavy post subtends about 3 m.o.a. and obscures a significant portion of the target if it's intersection with the cross-hair is used as the aiming point. Also, the cross-hair appears about 12 m.o.a. lower than mechanical/optical axis of the telescope, possibly causing some rifles to shoot abnormally high at short range. In short, use the top of the post as the aiming point as you do with the iron sights.

This procedure is used to adjust the mechanical limits of the windage and elevation knobs, and to mechanically zero their respective scales to the rifle on which the scope is mounted. The windage and elevation knobs are held in place by the larger of the two round nuts in the center of each knob. The larger nut secures the knob to the detent, which in turn is secured to the knob shaft. The small inner nut prevents the larger nut from backing off the shaft when making adjustments to the knobs. The round nuts can be turned with a flathead screwdriver with clearance ground out to clear the small inner nut.

First hold the knob in place and unscrew the larger nut about 2.5 turns or until it is stopped buy the small inner nut. You can now disengage the knob from the detent/shaft and turn the knob independently of the shaft. The detent/shaft is capable of approximately 720* of rotation while the knob is limited to about 350* when secured to the detent.

If you could not previously zero the rifle because one or both knobs had reached their mechanical limit, you can now adjust these limits. When the knob is at it's limit, lift the knob to disengage the detent/shaft and rotate the knob X* opposite the direction in which you reached the limit. Lower the knob to engage the detent/shaft at this new point. You have now moved the mechanical limit X* past the point of the previous limit thereby allowing further adjustment in that direction. You should again try to zero the rifle and repeat this adjustment as required, remembering the rotation of the shaft/detent is limited to 720*. After the rifle is zeroed, mechanically zero the scales on the knobs as explained below.

If the rifle was previously zeroed, and you haven't moved the knobs, you only need to lift the knob to disengage the detent/shaft; rotate the knob independently of the detent/shaft until the correct point on the scale is aligned with the pointer; lower the knob to engage the detent/shaft and tighten the larger nut. Do the same to the other knob and your done and you are finished.

[Twinson]

That's my video I made....I'm famous......

this will probably help you some "How to set a mechanical zero on the M84"

https://www.youtube.com/watch?v=sqQrkTrWq5U

[StockDoc]

That's my video I made....I'm famous......

Thanks I have shared it before and it really helped me figure my scope out