Great Lakes Firearms and Ammunition GL15 Complete Lower Features The Great Lakes Firearms and Ammunition GL15 Lower Group is built on a billet lower receiver marked for multi-caliber compatibility giving builders flexibility when pairing it with an AR-15 upper chambered in 5.56 NATO or .223 Remington. The receiver carries a Black Matte corrosion-resistant metal finish that stands up to regular handling and range use. This billet construction offers a solid foundation for builders looking to complete a rifle from the lower up. The corrosion-resistant coating helps protect the receiver through repeated exposure to weather and cleaning solvents. An adjustable black synthetic stock ships with the lower group allowing shooters to customize length of pull to match their body type and shooting stance. The polymer pistol grip provides a comfortable secure gripping surface that complements the adjustable stock for improved overall ergonomics. Together these features make the GL15 Lower Group a practical starting point for an AR-15 build focused on comfort and adjustability. For builders assembling a rifle from the ground up this lower group offers a dependable ready-to-configure foundation. Great Lakes Firearms and Ammunition GL15 Complete Lower Specifications Manufacturer: Great Lakes Firearms and Ammunition Model: GL15 Caliber: 5.56 / .223 Rem Type: Billet Lower Metal Finish: Black Matte Stock Finish: Black Stock Material: Synthetic Grip: Polymer Pistol Grip Available At: GrabAGun