The FN 510 Tactical carries 22+1 rounds of 10mm Auto at the ready giving you the stopping power you need to face any scenario. Red dot-ready with a crisp trigger; polished feed ramp and chamber; threaded .578″x28 to mount compensators and suppressors; Tritium lamp steel dovetail sights co-witness with most MRD optics; high-endurance conical striker; interchangeable backstraps; MIL-STD-1913 rail; fully ambidextrous slide stop lever and magazine release. Includes two interchangeable backstraps two magazines four MRD mounting plates owners manual locking device and zippered case.