Santan Stt-15l Lt Lower Receiver

The San Tan Tactical STT-15L LT Lower Receiver is purpose-built for shooters and gunsmiths who demand precision and reliability in their AR-platform builds. This lightweight lower receiver serves as the serialized foundation of any modern sporting rifle or tactical carbine platform, engineered to mil-spec standards for compatibility with standard upper receivers and component groups. Whether you're assembling a duty rifle, competition platform, or precision shooter, this component provides the controlled, registered receiver foundation that defines your firearm's baseline accuracy and longevity.

San Tan Tactical has optimized this lower receiver for weight-critical builds without sacrificing structural integrity or material quality. The lightweight design reduces overall platform mass—critical for extended patrol or field operations where cumulative fatigue affects shooter performance and target acquisition. Precision-machined from quality aluminum, the receiver maintains mil-spec dimensions and accepts all standard fire control components, buffer tubes, and stock assemblies, ensuring zero compatibility headaches during assembly. The "LT" designation reflects the weight-optimized profile while maintaining the rigidity necessary for reliable function and consistent group shooting across thousands of rounds.

This lower receiver is ideal for law enforcement patrol builds, tactical carbine platforms, and civilian sporting rifles where weight savings matter without compromising durability. Armorer-level installation requires standard gunsmithing tools and familiarity with AR-platform assembly—this is not a drop-in component but rather the core serialized receiver that anchors your complete firearm assembly. Compatibility spans all mil-spec upper receivers, trigger groups, and buffer systems, making it a flexible foundation for everything from 5.56 NATO to pistol-caliber conversions within your platform family. At 0.75 lbs, this receiver contributes meaningfully to overall system weight reduction while maintaining the precision tolerances that define modern rifle performance.