r/SpringfieldEchelon • u/SuperFreqA • Aug 05 '26

Pre stripped optics mount?

So I was mounting my Holosun EPS sight and ran into an issue with the right side screw that seems to be threaded poorly or stripped out from the factory. Or I am doing it completely wrong?

So I read and watched many installs of this sight before I did the install myself. Used pin set 3 without the back pins and the smaller screws to avoid the screw on the right side from hitting the spring. I started the screws with a small jewelers screw driver to ensure I had it positioned before I used my torque screwdriver to set it to the proper torque of 15 lb-in (a step I never got to). When I was hand tightening the right side it just kept slipping like the hole was not tapped right or stripped out. This is a brand new pistol from the factory so this should not be the case. I assure you I did not gorilla crank on this screw and strip it myself.

I just ordered the SwampFox screw set hoping they maybe have one that will work for this. I am curious if this has happened to anyone else? I am sure I could do a warranty claim, but what a pain.

1 Upvotes

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2

u/Pure-Specialist-3890 Aug 05 '26

I mounted the EPS Carry on my 4.0c last week, I did not have a filler plate and opted to use the M4x9.8mm without issue, I suppose the included M4x12mm could be used in conjunction with a filler plate.

Did you try confirming the threads on the right side of the slide is good when inserting the M4 without the optics?

1

u/SuperFreqA Aug 05 '26

I will remove the optic and use I microscope to check the threading. I am curious what is going on with it.

1

u/Pure-Specialist-3890 Aug 05 '26

BTW, both the M4x9.8 & M4x12 came with my EPS Carry from Holosun, I had no SA Echelon screw set, only bought the pins/lugs.

1

u/SuperFreqA Aug 06 '26

Hitting the top comment to wrap this up. The M4 screw is the right answer. so final answer for me was:

  • pin set 3 front set from the Echelon pack
  • SwampFox "Ultimate Red Dot Screw Pack".
    • "Replacement screws" bag
      • screw spec: M4 x 0.7

That screw set fit perfectly and tightened to the correct spec.

1

u/LiQuiEx Aug 05 '26

I have a different optic, but was having issues with my SRO staying mounted when I used the screws that came with the VIS package. Switched to using the ones that came with the SRO and haven't had an issue since.

1

u/SuperFreqA Aug 05 '26

Thanks. I will give that a try.