Springfield Armory | Echelon Magazine | 9mm | Black

Springfield's factory Echelon magazine uses a double‑stack stainless steel tube with a high‑tensile steel spring and polymer follower, finished in a blacked‑out corrosion‑resistant coating and built proprietary to the Echelon platform -⁠- it won't swap with Hellcat or XD‑series magazines despite sharing a manufacturer. Numbered witness holes give a genuine at‑a‑glance round count, and capacities run from a flush‑fit 10 or 17 rounds up through an extended 20‑round version with a longer polymer basepad. The exact factory magazine engineered around the Echelon's own feeding geometry.