Mark 23 DA/SA two 10rd magazines - Threaded O-ring barrel with polygonal bore profile - Match grade trigger - One piece machined steel slide - Frame mounted decocking lever and separate ambidextrous safety lever - Can be carried cocked and locked in single action mode with the safety lever on - Patented HK recoil reduction system - Corrosion resistant blued finish - Corrosion proof fiber-reinforced polymer frame - Oversized trigger guard for use with gloves - Universal mounting grooves for installing accessories - Ambidextrous magazine release lever - Extended slide release - Extractor doubles as a loaded chamber indicator - Patented Lock-Out Safety device