This is the Promag Springfield Hellcat 9mm 17 Round Extended Magazine. Designed for the Springfield Hellcat and Hellcat Pro, this extended magazine boosts your capacity to 17 rounds, great for extended range sessions. The magazine’s body is crafted from blued steel, providing rugged durability and a sleek appearance. Inside, the black polymer follower features an anti-tilt design, ensuring smooth, reliable feeding and reducing the likelihood of jams. The robust steel spring wire maintains consistent tension for dependable performance. This magazine includes a nice addition: a removable polymer grip sleeve. This sleeve not only prevents over-insertion during reloads but also enhances grip and comfort, making it easier to handle the pistol with the extended magazine. The polymer baseplate protects the magazine from high drops. Buy one today and try it out yourself!