This is a factory OEM Springfield Echelon 4.0C (Compact) 9mm 18-round magazine. 

Maximize your capacity and carry confidently with these genuine 18-round magazines from Springfield Armory!

All 18 rounds of 9mm will be securely protected within this durable stainless steel magazine. Ensuring each of those rounds feeds smoothly, you’ll find an anti-tilt polymer follower and a high-quality steel spring inside. 

Precision-cut numbered rear-facing witness holes will help you keep track of your remaining rounds, and the textured extended base plate will provide ample control and assistance for reloads. From defensive roles to range time, these are the magazines you’ll want for your Springfield Echelon 4.0C. 

These 18-round extended magazines will likely sell fast, so add a few to your cart now!