Griffin Armament MK1SL MK1 Multi-Caliber AR-15 Stripped Lower Receiver

Griffin Armament MK1 Multi-Caliber AR-15 Stripped Lower Receiver Overview: The Griffin Armament MK1 AR-15 Stripped Lower Receiver is a precision-machined foundation for building a reliable and high-performance AR platform. Constructed from high-grade 7075-T6 aluminum and finished with a durable Type III hardcoat anodizing, this lower receiver is designed to meet mil-spec standards for compatibility and durability. Whether you're assembling a custom rifle or upgrading an existing build, the MK1 p