Build a reliable, custom AR-15 with the Ruger 28500 Forged Stripped Lower Receiver. This precision-machined component delivers a strong foundation for any AR-platform project, allowing builders to select their preferred lower parts kit, trigger group, and stock for a tailored fit. Key Features 7075-T6 Forged Aluminum Construction - Provides exceptional strength and durability while maintaining a lightweight profile for comfortable handling during extended use. Mil-Spec Dimensions - Ensures broad compatibility with standard AR-15 components, reducing fitment issues and simplifying assembly. Broached Magazine Well - Delivers clean, consistent internal dimensions for reliable magazine insertion and lockup across a variety of STANAG-pattern magazines. Full-Cut Fire Control Pocket - Accepts a wide range of mil-spec triggers and fire control groups without modification. Adjustable Tension Screw - Allows fine-tuning to minimize play between upper and lower receivers for a tighter, more precise fit. Hardcoat Anodized Black Finish - Offers corrosion resistance and a professional appearance that withstands regular use. Specifications Platform: AR-15 Material: 7075-T6 Forged Aluminum Finish: Hardcoat Anodized Black Caliber Marking: Multi-Caliber Trigger Guard: Not Included Stock: Not Included Handedness: Right Ambi Controls: No Magwell Embellishment: Text Weight: 9.6 oz Dimensions: 11 in (L) x 6.2 in (W) x 2 in (H) Why Choose the Ruger 28500? This stripped lower solves common builder pain points by offering proven Ruger quality in a versatile, multi-caliber platform. Its forged construction and mil-spec tolerances support reliable performance whether you're assembling a defensive rifle, competition build, or general-purpose firearm. The included tension screw addresses receiver play without extra shims or modifications, streamlining your project from start to finish. Ideal for experienced builders seeking a dependable base from a trusted American manufacturer, the Ruger 28500 provides the flexibility to customize every detail while meeting rigorous structural standards.