The Ghost Inc LoViz MOAB +4 Magazine Extension for Gen 2-5 Glock 19, 23 and 32 pistols enhances your magazine capacity while maintaining a sleek, low-profile design for deep concealment. It adds four extra rounds to 9mm magazines and three extra rounds to .40 ACP and .357 Cal magazines. Designed for smooth handling, its ergonomic edges ensure quick and effortless magazine swaps, while the patented perimeter ring provides a secure and durable fit. This extension also includes an extra power magazine spring for reliable feeding. Proudly made in the USA and backed by a lifetime warranty, it's a must have upgrade for increased capacity and seamless performance. Adds 4-round to 9mm factory Glock magazines and 3-round to .40 ACP and .357 magazines Fits with Glock Factory 19, 23, 32 and 33 magazines Includes extra power magazine spring for reliable feeding Low-profile design enhances deeper concealment Ensures positive magazine seating for secure and consistent reloads Perimeter ring reinforcement for secure extension retention Tough construction ensures long-lasting performance Smooth ergonomic edges enhance comfort and usability Backed by Ghost's unconditional lifetime warranty for peace of mind