Polymer80 steel-lined 17-round magazine for Glock 17 pistols. Designed as a reliable, affordable alternative to OEM Glock magazines with a reinforced steel insert for consistent feeding and durability. Specifications: • Capacity: 17 rounds • Caliber: 9mm Luger • Body: Polymer with steel liner for structural rigidity • Baseplate: Polymer, flush fit • Compatibility: Glock 17 — all generations (Gen 1 through Gen 5) • Also compatible with Glock 34, Glock 45, and other double-stack 9mm Glock models that accept full-size magazines (verify fitment for your specific model) The steel lining prevents flex under spring tension and ensures the magazine body maintains proper geometry over thousands of cycles. The feed lips are reinforced to prevent spreading, which is a common failure point on all-polymer magazine designs. These magazines are a practical choice for range use, training, or as backup carry magazines. Note: Check your local and state laws regarding magazine capacity restrictions before ordering. 3CR Tactical does not ship restricted-capacity magazines to jurisdictions where they are prohibited. GLOCK is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. or GLOCK Ges.m.b.H. Neither 3CR Tactical nor this site are affiliated with, or endorsed by, GLOCK, Inc. or GLOCK Ges.m.b.H. The use of "GLOCK" on this page is merely to advertise the sale of aftermarket GLOCK pistol components. For genuine GLOCK, Inc. products, visit www.glock.com.