You can make the reg circ saw into a track saw by switching base plates. This is a standard setup in England I've seen https://www.partshopdirect.co.uk/dewalt-dcs575-dcs576-shoe-base-with-guide-rail-slots-pN472354/ : r/Dewalt
Dewalt 54v 18v DCS570 DCS575 DCS576 DCS572 Circular Saw Case Deep TSTAK + Insert 5055995559502 | eBay
DeWalt DCS576 Flexvolt Circular Saw and Vacuum Kit - 2x 4Ah Batteries, Charger and Case