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  • Post last modified:August 19, 2023

There have been many questions regarding the Holosun K footprint on whether it's the same as the RMSc footprint.

There are a lot of vague information out there, and causing people buying the wrong optics. So this guide shows exactly how they are different with images, and what you can do with them.

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Holosun K Footprint VS RMSc

The Holosun K footprint differs from the RMSc despite their similar appearance. However, the mounting holes share the same specifications.

Nevertheless, the recoil lug positions on the K footprint are distinct, and the mount is secured by index post pins.

  • Modified RMSc Footprint has 4 recoil lugs, two in the front, two in the back
  • The Holosun K Series footprint has two in the front only with shallower recoil lug recesses

Here is the bottom views side by side

rmsc vs holosun k pattern

Do I Have To Modify The Slide Cut?

We strongly advise against this unless you possess the necessary skills, but you have the alternative of filing down the recoil lug tabs on your slide or optic plate.

As previously stated, the only distinction between the K Series and RMSc footprint is that the K series possesses shallower recoil lugs, which are located solely at the front.

Since all other aspects remain identical, you can file down the rear recoil lugs to align them with the slide, and you can also file down the front lugs to match the shallower lugs on the K series optic.

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Can Holosun EPS Carry Fit On RMSc Optic Cut?

Yes, the Holosun EPS Carry can fit on handgun slides cut for RMSc with the adapter plate provided when purchasing a Holosun EPS Carry.

The adapter plate locks in around the RMSc index posts to provide a secure mounting platform, then the optic goes on top.

However, if you don't have the adapter, then it will not work.

Which Handguns Can Fit The Holosun K Footprint ?

Most guns with RMSc footprint with the adapter can work. 

  • Canik TP9 Elite SC
  • FN Reflex MRD
  • Mossberg 940 Tactical (Shotgun)
  • PSA 5.7 Rock
  • PSA Micro Dagger
  • Ruger Max-9
  • Shadow Systems CR920
  • Sig P322
  • Taurus GX4, GX4 XL T.O.R.O
  • Taurus TX22 Compact
  • P365
  • Glock 43X MOS

Springfield Hellcat With Holosun EPS Carry

holosun eps carry on springfield hellcat

Sig P365XL With Holosun EPS Carry

sig p365 holosun eps carry