Shop › MAG RUGER MINI-14 300BLK 20RD BLK MAG RUGER MINI-14 300BLK 20RD BLK $42.95 Ruger Magazine, 300 Blackout, 20 Rounds, Fits Mini-14, Steel, Black 90484 Quantity: Add To Cart Added! Ruger Magazine, 300 Blackout, 20 Rounds, Fits Mini-14, Steel, Black 90484