I found mine on amazon. Then put 3x7 vortex on it. Here you go FUNANASUN M-lok Picatinny Rail,... https://www.amazon.com/dp/B01IBF9ZMY?ref=ppx_pop_mob_ap_share

Would also recommend this GlobalPioneer RED Laser Arbors... https://www.amazon.com/dp/B07DQ9S5KM?ref=ppx_pop_mob_ap_share