FN 510 MRD & 545 MRD: Optics-Ready, Big-Bore Hammers
Last year, FN announced the launch of two new big-bore, optics-ready striker-fired pistols, the FN 510 MRD and 545 MRD. Each comes in slightly bigger than the popular FN 509, bringing 15+1 rounds of either 10mm or .45 ACP. 510...