VANCOUVER, BC, April 6, 2022 /CNW/ – GR Silver Mining Ltd. (“GR Silver Mining” or the “Company”) (TSXV: GRSL) (OTCQB: GRSLF) (FRANKFURT: GPE) – is pleased to confirm the extension of wide high-grade silver (Ag) mineralization from underground drilling in the San Marcial Area, at the Plomosas Project, Sinaloa, Mexico. These assay results are from three underground drill holes completed in 2021 and reinforce the widening of the mineral body at depth and along strike, supporting potential resource expansion. The successful eight-hole underground drill program confirmed a significant expansion of high-grade Ag mineralization approximately 300 m down dip below the lower limit of the pit-constrained San Marcial NI 43-101 (2019) mineral resource. Highgrade drill hole SMI21-07 indicates extension of the Ag mineralization by almost 100 m down dip below previously released drill hole SMI21-04 (Figures 1 and 2) (see News Release dated January 31, 2022).