Schmidt Bender 3-12x50 PMII LP DT Gen II MTC Elevation Turret Issue

GizmoUSMC

Private
Minuteman
Aug 6, 2025
6
0
Nv
Hello Gents,
I have been lurking here for a while. I have an issue so I decided to join. I purchased one of the Euro Optics Schmidt Bender 644-911-972-89-64A68 USMC M8541 optics for a M40A3ish rifle I have been putting together for years. The first one I received the elevation turret was locked up with less than 8 MRAD's of movement so I contacted Euro Optics and sent it back. They said it would have to go back to the manufacturer and they promptly send me another. This 2nd I received is 4 scopes later in the serial number line so they were probably assembled by the same person I suspect. The issue I am having with this 2nd one is that is seems to be locked on the send rotation. I get 10 mils of adjustment with the heavy clunk of the MTC turret with 6 mrads on either side and that is in line with what it should be. I can find very little info on this USMC turret. I am familiar with the optic but not these turrets. I should be able to wind down and have somewhere in the range of 23 mils of adjustment. This is not a locking turret and I tried resetting the zero stop and when done I get the same result. I find it extremely hard to believe that I have received two defective SB optics so I suspect this is user error. Any assistance is appreciated. I know I can contact Euro Optics and return this but at this point I might be better off sending it to Schmidt Bender and having this fix it if the problem is not me.
 

Attachments

  • SB1.jpg
    SB1.jpg
    78.9 KB · Views: 15
  • SB2.jpg
    SB2.jpg
    85.6 KB · Views: 15
  • SB3.jpg
    SB3.jpg
    92.5 KB · Views: 17
  • SB4.jpg
    SB4.jpg
    96.2 KB · Views: 16
  • SB5.jpg
    SB5.jpg
    81 KB · Views: 15
Take the elevation cap off and look inside, there's a barrel in there with a u shaped notch cut in it. Use a small screwdriver to rotate that barrel so the unshaped notch is pointed to about 2:00. Put the turret back on and without tightening the set screws rotate the turret down to zero, now tighten the set screws. You should be able to have travel into the second rev now.

Edited for clarity.
 
The reason your issue happens is that if that barrel in the turret isn’t oriented correctly it won’t engage the pin on the housing. Instead it acts as a stop and keeps the turret from rotating all the way.


I managed to find an old pic showing what I’m talking about. That u shaped notch needs to be turned so it can pick up the pin.
Come to think of it, when I get home I’ll see if I have the instructions I made years ago for just this issue.
 
Last edited:
The reason your issue happens is that if that barrel in the turret isn’t oriented correctly it won’t engage the pin on the housing. Instead it acts as a stop and keeps the turret from rotating all the way.


I managed to find an old pic showing what I’m talking about. That u shaped notch needs to be turned so it can pick up the pin.
Come to think of it, when I get home I’ll see if I have the instructions I made years ago for just this issue.
So I am the problem! LOL, you are awesome. I really appreciate the assistance. I will try to get this sorted when I get home.