The rail is the standard dovetail (tip off) tje tippman a5 comes with the sight https://www.amazon.com/TRUGLO-Red-Dot-Color-Sight-Black/dp/B001EYFK1U/ref=mp_s_a_1_4?crid=25ML7F2LRAISZ&keywords=truglo+dual+color+dot+sight&qid=1666418882&qu=eyJxc2MiOiIyLjI2IiwicXNhIjoiMS44NCIsInFzcCI6IjEuNzgifQ%3D%3D&sprefix=truglo+dial+%2Caps%2C128&sr=8-4
Something like this? TRUGLO 30mm Dual-Color Dot Sight https://www.amazon.com/dp/B001EYFK1U/ref=cm_sw_r_cp_api_fab_dY6FFbES1B5GQ