So are the magazine release and slide stop ... FN America also offers another pair of versions, the FNX-45 Tactical and FNX-45 Tactical FDE. Both come with a threaded barrel with its length ...

Each FN 510 Tactical and FN 545 Tactical ships with two magazines, one 15-round magazine and another extended magazine, with an 18-round capacity for .45 ACP and 22-round capacity in 10 mm Auto.