Build or maintain your AR-15 pattern rifle with confidence using the Ruger 91001 AR Lower Parts Kit. This comprehensive collection of mil-spec components provides the essential hardware needed to complete an AR lower receiver assembly, allowing custom builders and enthusiasts to focus on selecting their preferred trigger system and grip separately. Key Features Includes a mil-spec disconnector along with trigger and hammer pins for reliable function Features safety selector with spring, magazine catch assembly, and bolt catch components for complete operational control Contains takedown and pivot pins with springs and detents, buffer retainer with spring, and trigger guard assembly Comes with grip screw, washer, and adjustment screw to secure your chosen pistol grip Designed specifically for AR-15 pattern firearms to Ruger's standards of rugged reliability Specifications Compatibility: AR-15 pattern rifles and pistols Fire Control Group: Not included (trigger, hammer, and related springs omitted) Pistol Grip: Not included Material/Finish: Phosphate-coated components for durability and corrosion resistance Dimensions: 5.9" L x 4.5" W x 1.3" H Weight: 3.36 oz Why Choose This Product Assembling an AR lower receiver often involves sourcing numerous small pins, springs, and catches individually, which can be time-consuming and lead to compatibility issues. The Ruger 91001 kit solves this by bundling all necessary lower hardware into one package, streamlining your build process while delivering factory-quality parts engineered for consistent performance and longevity. Installation by a qualified gunsmith is recommended to ensure proper fit and safety. Common Applications Completing a stripped AR-15 lower receiver build Replacing worn or lost components during maintenance Custom AR platform projects where trigger and grip are sourced separately Equip your next project with genuine Ruger components for dependable results. This kit delivers the precision and quality you expect from a trusted manufacturer.