Desert Tech QTR-LR-15 Quattro-15 Lower Receiver AssemblyThe Desert Tech Quattro-15 Lower Receiver Assembly QTR-LR-15 is a premium component designed to enhance your AR15 rifle. This Desert Tech QTR-LR-15 assembly is engineered to seamlessly integrate with all standard AR15 upper receivers, providing compatibility with Desert Tech’s Quattro-15 53-round magazines and standard AR-type magazines when used with an adapter. With proprietary magazine release and bolt catch parts, this lower receiver assembly maintains compatibility with other standard AR15 components, ensuring versatility and reliable performance. Elevate your AR15 with the DesertTech QUATTRO-15 Lower Receiver from DesertTech. This drop-in lower seamlessly integrates with all standard AR15 upper receivers, expanding compatibility to include DesertTech’s QUATTRO-15 53-round magazines and standard AR-type magazines with an adapter. With only proprietary magazine release and bolt catch parts, the QUATTRO-15 Lower Receiver remains compatible with all other standard AR15 components, offering versatility without sacrificing performance. Features of the DesertTech QUATTRO-15 Lower Receiver: Compatible with all standard AR15 upper receiversAllows the use of DesertTech’s QUATTRO-15 53 round magazinesOnly proprietary parts are the magazine release and bolt catch, compatible with all other AR15 partsCan accept standard AR15 mags (with the use of an adapter) Desert Tech Quattro-15 Lower Receiver Assembly QTR-LR-15