The FN 502 is 7.6" long, 5.8" tall and 1.4" wide, and its threaded barrel, which is 4.6" long, features 1:16" right-hand-twist rifling. FN includes a knurled-metal thread protector to cover the muzzle’s 1/2x28 TPI threads and protect the target crown. At an unloaded weight of 23.7 ozs., it feels substantial for a rimfire pistol.
Bron: American rifle man