Santan Pillar Lt Upper Receiver

The San Tan Tactical Pillar LT Upper Receiver is a precision-machined AR15/M16/M4 upper assembly engineered for structural rigidity and field reliability. This upper receiver is designed for operators, range competitors, and professional end-users looking to build or upgrade AR-platform rifles where structural precision matters.

Cut from a single billet of 7075-T651 aerospace-grade aluminum, this upper receiver features San Tan's signature PILLAR truss pocket design, which increases lateral stiffness while maintaining a lightweight profile. The receiver is finished in a Mil-Spec Type III Class II hard coat anodized black finish, providing durable corrosion resistance across various duty environments. The upper is machined to Mil-Spec standards with M4 feed ramps for reliable feeding across ammunition variants and includes a shell deflector to manage brass ejection.

The LT designation indicates a lightweight configuration optimized for carbines and shorter builds, making it a versatile choice for various applications. It features factory T-markings machined directly into the top surface for quick-reference alignment for optic mounting systems, ensuring that users can easily customize their setups for optimal performance.