Product Description The Desert Tech Quattro-15 Multi-Caliber AR-15 Lower Receiver (QTRLR15B53) is a purpose-built firearm component designed to maximize ammunition capacity and platform versatility. Finished in black, this lower receiver accepts Desert Tech&';s proprietary Quadmag-53 high-capacity 53-round magazine as well as standard AR-pattern magazines, offering shooters the best of both worlds. Engineered for seamless drop-in compatibility with all standard AR-15 upper receivers, the Quattro-15 requires no modification to your existing setup. With the included Quad53 magazine, operators can carry a full 210-round loadout using only 4 magazines instead of the 7 required with standard 30-round magazines, delivering a significant tactical and logistical advantage in the field. Product Highlights High-Capacity Magazine Support: Accepts the Quad53 53-round magazine, allowing a 210-round loadout with just 4 magazines instead of 7. Standard AR Pattern Compatible: Also works with standard AR-pattern magazines for maximum flexibility across different mission requirements. Drop-In Installation: Fully compatible with all standard AR-15 upper receivers for tool-free, hassle-free installation. Multi-Caliber Design: Built to support multiple calibers, enhancing the overall versatility of your AR-15 platform. Includes Quad53 Magazine: Ships with Desert Tech&';s proprietary 53-round Quadmag-53 magazine right out of the box. Specs Brand: DESERT TECH Model: Quattro-15 MPN: QTRLR15B53 UPC: 813865026784 Caliber: Multi-Caliber Color: Black Compatible Platform: AR-15 Magazine Compatibility: Quad53 (53-round) and Standard AR-Pattern Includes: Quad53 Magazine Weight: 1.5 lbs Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.