Chambered in the 5.7x28mm cartridge, the FN PS90(R) utilizes blowback operation and fires from a closed bolt for greater accuracy and reliability. The FN PS90(R)\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'s civilian legal 16.04\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\" cold hammer-forged MIL-SPEC barrel is equipped with an integrated muzzle brake to reduce recoil. Dual magazine latches, cocking handles and an innovative synthetic thumbhole stock with a molded-in sling attachment point help make the FN PS90(R) fully ambidextrous.