Below are the Holosun Optics that have a Modified RMSc a.k.a. K Series footprint. This is similar to the RMSc footprint except it does not have a recess for rear recoil lugs. To learn more read our RMSc vs Modified RMSc blog post.

If you are mounting these optics to certain pistol like the G43X/G48 MOS or S&W Shield Plus you will need an adapter plate. Read our fitment guides to learn more or reach out if you have further questions.

These will mount directly to the following models:

• Bul Armory SAS II Ultralight 
• S&W M&P 5.7 (needs these screws)
• S&W Equalizer (needs these screws)
• Sig P322, 365X, 365XL, 365X-Macro, 365-380
• Canik TP9 Elite SC
• Mossberg 940 Tactical (Shotgun)
• and others!