The Streamlight TLR-7X w/Integrated Contour Remote Switch is not compatible with your Springfield Hellcat. I would recommend the TLR-7 Sub weapon light with the Hellcat mounting method, which can be found by using the link below:
https://www.opticsplanet.com/streamlight-69428-tlr-7-laser-light-combo-handgun-glock-led-500-lumens-black-alu.html?_iv_gun-model=springfield-armory-hellcat