The ALG Defense AR-15 LOWER PARTS KIT W/ QMS TRIGGER delivers a reliable, drop-in ready solution for AR-15 builders seeking a high-performance, precision-oriented lower receiver package. Engineered around the acclaimed QMS trigger, this kit provides a smooth, controlled pull with reduced creep and predictable break, enhancing accuracy for both target shooting and practical rifle applications. Designed for AR-15 compatibility, it assembles into standard lowers to support a wide range of builds, from competition first-tins to tactical configurations, while maintaining consistent function under varied conditions. The kit includes essential components needed to complete the lower assembly with dependable operation, allowing shooters to optimize ergonomics, reset, and overall trigger feel without compromising safety or reliability. Built with quality materials and tight tolerances, it pairs seamlessly with any compatible upper and buffer system, enabling easier maintenance, faster upgrades, and a cohesive trigger-to-fire control experience. Whether upgrading an existing platform or assembling a fresh rifle from a parts list, the ALG Defense AR-15 LOWER PARTS KIT W/ QMS TRIGGER provides a durable, shot-friendly foundation for precision, control, and confidence in the field or on the range.