Griffin Armament MK2 AR-15 Stripped Lower Receiver - Ambidextrous, Multi-Caliber Overview The Griffin Armament MK2 AR-15 Stripped Lower Receiver is a premium foundation for high-performance AR builds. Precision machined in the USA from custom-forged 7075-T6 aluminum, the MK2 features true ambidextrous controls, enhanced ergonomics, and a durable Type III hardcoat anodized finish. Designed for shooters who demand reliability, versatility, and refined handling, this lower receiver is ideal for both professional-duty and enthusiast-grade builds. Key Features a Custom-forged 7075-T6 aluminum construction for exceptional strength and durabilitya Fully ambidextrous magazine release and bolt catch/release controlsa 60Adeg flared magazine well for smooth, consistent reloadsa Integrated trigger guard for added rigidity and glove-friendly usea Type III hardcoat anodized black finish for long-term wear resistancea Precision in-machine deburring and deflashing for superior fit and finish a Made in the USA Specifications a Platform: AR-15a Caliber Compatibility: .22 Cal / 5.56mm / .300 Blackouta Receiver Type: Stripped lower receivera Fire Control Pocket: Mil-Speca Action Type: Semi-Automatica Weight: 8.9 oz (stripped)a Frame Material: Aluminuma Country of Origin: United States Applications Ideal for custom AR-15 rifle or pistol builds, duty and tactical rifles, competition setups, and shooters seeking true ambidextrous operation for left- or right-handed use. Additional Features a Includes Griffin Armament ambidextrous magazine release and ambidextrous bolt catch and release controlsa Compatible with standard mil-spec AR-15 lower componentsa Note: Does not include standard right-side magazine release button Regulated firearm component; transfer through a licensed FFL required