San Tan Tactical STT-15 Pillar Upper Receiver .223/5.56

Description

The San Tan Tactical STT-15 Pillar Upper Receiver is described by the manufacturer as the lightest billet upper available and is designed to address perceived shortcomings in common billet receivers. Its truss pocket geometry redistributes stress across the receiver, intended to reduce concentration of load immediately behind the receiver threads. The STT-15 presents a flat top configuration and a finished black appearance as provided in the source data.

Key Specifications

• The product type is Upper.
• The subcategory is Upper Receivers.
• The model is listed as STT-15.
• The caliber/gauge is .223 REM / 5.56 NATO.
• The color is Black.
• The sight configuration is Flat Top.
• Construction is described as billet.
• The receiver incorporates truss pockets to distribute stress across the platform.
• This part is intended for the AR-15 platform.
• The manufacturer describes it as the lightest billet upper available.

The STT-15 Pillar upper is built around the concept of improved structural distribution and a sleek profile. Its truss pocket styling and billet construction aim to offer a distinctive mix of stiffness and reduced localized stress where shooters commonly mount long rails and grip the handguard. For builders and enthusiasts seeking a billet upper with a flat top configuration and a focus on structural design, the STT-15 presents a purposeful option.