Mass distributions of BHs obtained in the M_cl(0) = 5.0 × 10⁴ M_⊙ model clusters (initially all single stars; Sect. 3) for four remnant-formation scenarios as indicated in the legends (Z = 0.0001 taken). On each panel, both the natal mass distribution of the BHs and the distribution at t ≈ 20 Myr cluster-evolutionary time are shown (the steel-blue and blue histograms, respectively). The latter distribution represents well the mass spectrum of those BHs, which remain gravitationally bound to a medium-mass (young massive or open; in this case taken to be of ≈5 × 10⁴ M_⊙) cluster after their birth and which are, therefore, available for long-term dynamical processing in the parent cluster (see Sect. 3.1). The retained BH mass distributions (blue histograms), in these panels, are the outcomes of the standard, fallback-controlled natal kick model (Eq. (1)).