Primary BH mass distribution of BBH mergers for models A (left), B (center), and C (right) for the three evolutionary cases considered: NoEv (upper panels), Evol (middel panels), and Tidal (lower panels). Different colors correspond to different BH generations: 1g (blue), 2g (purple), 3g (salmon), and > 3g (yellow) BHs. Here, we show our models with Z = 0.0002 because they are representative of metal-poor GCs in the Galactic halo (Muratov & Gnedin 2010).