The Hellcat Pro would require you to purchase the C&H Precision Weapons Springfield Hellcat w/ RMSc Footprint Adapter Plate that converts your RMSc cut to the K footprint allowing you to install this optic. The plate can be found by using the link below. Another note, the MRS model of the EPS Carry actually includes an adapter plate that converts the RMSc footprint to the Holosun K footprint, meaning you would not need to purchase the C&H plate if you purchase the MRS model. I will link the MRS model below as well.
https://www.opticsplanet.com/c-h-precision-weapons-springfield-hellcat-w-rmsc-footprint-adapter-plate.html?_iv_code=5HT-RMT-CHSHR-SAHC-EPS
https://www.opticsplanet.com/holosun-carry-enclosed-pistol-sight-w-multiple-reticle-system.html
The EPS carry comes with an rmsc adapter plate from the manufacturer this will work with the Hellcat Pro you just need different screws I believe it's M9 and M10 screws M10 for the right and M9 for the left the adapter plate is a quarter of an inch thinner than any other adapter plate that is made which will allow this site to co-witness
The EPS carry comes with an rmscc adapter plate from the manufacturer this will work with the Hellcat Pro you just need different screws I believe it's M9 and M10 screws M10 for the right and M9 for the left the adapter plate is a quarter of an inch thinner than any other adapter plate that is made which will allow this site to co-witness