VANCOUVER, BC, Dec. 20, 2021 /CNW/ – GR Silver Mining Ltd. (“GR Silver Mining” or the “Company”) (TSXV: GRSL) (OTCQB: GRSLF) (FRANKFURT: GPE) – announces the sale of two non-core concessions, El Salto and El Salto Sur (the “Concessions”), which were acquired from Mako Mining Corp. on March 31, 2021, to Grupo Minero Venturex S.A. DE C.V. (“Venturex”), a private Mexican company