The Spikes Lower Receiver Stripped ST-15 Spider Bullet Marking is a versatile and affordable option for those looking to build or upgrade their AR-15 platform. This stripped lower receiver is designed to be compatible with a variety of calibers, including 223 Rem/556NATO. With its black hardcoat anodized finish, it provides a durable and long-lasting surface. The 7075 T6 aluminum construction ensures a high level of strength and reliability. Whether you're a seasoned shooter or just starting out, this lower receiver is a great choice for those on a budget. Plus, with fast shipping, you can get your hands on this product quickly and start building your dream rifle. Product Features and Specifications: Caliber: Multi-Caliber Category: Lowers Finish: Black Hardcoat Anodized Gun Model: AR-15 Gun Type: AR Platform Material: 7075 T6 Aluminum Trigger: None Type: Lower Receiver