ProMag Springfield Armory Kuna 9mm 40rd Polymer Extended Magazine Overview The ProMag Springfield Armory Kuna 9mm 40-Round Curved Extended Magazine is built for shooters who demand increased capacity, dependable feeding, and rugged durability. Engineered specifically for the Springfield Armory Kuna 9mm platform, this extended aftermarket magazine features lightweight polymer construction, a heat-treated chrome silicon spring, and an injection-molded follower for reliable performance during range sessions, training, and defensive applications. Key Features 40-round extended capacity for reduced reload frequency Compatible with Springfield Armory Kuna 9mm pistols Proprietary DuPont Zytel-based polymer body for lightweight durability Curved magazine design promotes reliable cartridge alignment Heat-treated chrome silicon wire spring for consistent feeding performance Injection-molded polymer follower for smooth operation Durable aftermarket replacement magazine Made in the USA Specifications Caliber: 9mm Capacity: 40 Rounds Magazine Type: Extended Curved Magazine Construction Material: Polymer Spring Material: Heat-Treated Chrome Silicon Wire Follower Material: Injection-Molded Polymer Finish: Black Product Type: Magazine Shipping Weight: 0.36 lbs MPN: SPR-A23BUPC: 708279017551 Applications Ideal for range training, recreational shooting, PCC setups, home defense preparedness, and high-volume shooting sessions where increased magazine capacity is preferred. Additional Features The curved extended-body design helps maintain reliable feeding while offering improved handling and extended shooting time between reloads. Its lightweight polymer construction keeps added weight manageable without sacrificing strength or durability.