ETS mags won't crack or break, are resistant to heat, cold, UV and harsh chemicals - won't become brittle over time. ETS mags come with enhanced features like non-tilt followers, creep-resistant feed...
The FN 509 Compact 9mm magazine features a stainless steel body with a flat black finish, high visibility anti-tilt follower, and extended floorplate. Will not work with FNS or FNX series pistols.