- The FN 510 MRD carries 15+1 rounds of 10mm Auto at the ready, giving you the stopping power you need to face any threat. But holding all the power and capacity doesn’t matter if you can’t put rounds on target, so it’s made for pinpoint control – red dot-ready, with a crisp trigger and unrivaled ergonomics. All the elements for a premium shooting experience are on-board, purpose-built to control maximum energy with minimal effort.