The Aero Precision M5 .308 Complete Lower Receiver stands as a formidable foundation for your custom big-bore AR rifle. In the realm of modern firearms, versatility and reliability are paramount. This complete lower receiver is engineered to meet those demands with precision. Crafted to accommodate standard AR 308 components and magazines, this lower receiver ensures compatibility across a broad spectrum of accessories. The inclusion of an integrated trigger guard enhances both functionality and comfort during operation. Attention to detail is evident in its construction; the rear takedown pin detent hole comes threaded for a 4-40 set screw, eliminating the common issue of loose pins that can disrupt performance in critical moments. Similarly, the bolt catch features threading for a screw pin—no roll pin required—allowing for easier assembly while maintaining structural integrity. Selector markings on this receiver cater not only to traditional safety selectors but also support 45, 60, or 90-degree configurations. For those who prefer advanced controls, it readily accepts Battle Arms Development short throw safety selectors without compromising any aspect of usability. Additionally, there’s no gap when using aftermarket pistol grips—an important feature that many builders appreciate as it allows for seamless customization without sacrificing aesthetics or function. This package includes everything you need: the Aero Precision M5 Lower Receiver itself along with a Magpul STR Stock that provides stability and comfort during use; a Magpul MOE Grip designed for enhanced ergonomics; a comprehensive lower parts kit ensuring all necessary components are at hand; plus a receiver extension equipped with .308 carbine buffer and spring. In essence, whether you're assembling your first build or upgrading an existing platform, the Aero Precision M5 .308 Complete Lower Receiver offers unmatched quality and adaptability. It embodies what every serious marksman seeks: reliability under pressure combined with user-friendly design elements that enhance overall shooting experience.