The Rost Martin RM1C 9mm 10-Round Magazine is a restricted-capacity magazine, engineered to deliver the same fit and reliable performance as standard-capacity magazines while conserving ammo and retaining compliance with restricted states. Featuring a durable steel body with a corrosion-resistant finish, this magazine is designed to deliver long-lasting and consistent performance in virtually any environment. Numbered witness holes deliver quick, visual round counts, and the steel spring and high-visibility polymer follower work together to ensure ultra-smooth feeding performance. The shock-resistant polymer floor plate easily withstands bumps, drops, and other potential hazards for long-lasting performance and improved reliability. Plus, this magazine is machined to exact tolerances for a snug, wobble-free fit, and consistent operation when it matters most. 10-round capacity.