• San Tan Tactical STT-15 Pillar Billet Upper Receiver .223 Rem
  • San Tan Tactical STT-15 Pillar Billet Upper Receiver .223 Rem
  • San Tan Tactical STT-15 Pillar Billet Upper Receiver .223 Rem
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San Tan Tactical

San Tan Tactical STT-15 Pillar Billet Upper Receiver .223 Rem

San Tan Tactical STT-15 Pillar Billet Upper Receiver .223 Rem

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The San Tan Tactical STT-15 Pillar Upper Receiver is a billet .223 Remington upper built from 7075-T651 aerospace-grade aluminum with an innovative truss pocket design that distributes stress across the entire platform. M4 feed ramps support reliable feeding, and the Mil Spec Type III Class II hard coat anodized black finish resists wear.

Optimized for 15" and 16" rail systems, the truss structure acts like a bridge to improve accuracy while keeping the receiver among the lightest billet uppers available.

Key Features

Brand San Tan Tactical
Model STT-15
Product Type Upper Receiver
Caliber 223 Remington
Material 7075-T651 Billet Aluminum
Finish Mil Spec Type III Class II Hard Coat Anodized Black
Feed Ramps M4
Rail System Compatibility 15" and 16" Rail Systems
Condition New

Highlights

  • Billet 7075-T651 aerospace-grade aluminum construction
  • Innovative truss pocket design distributes stress across the entire platform
  • M4 feed ramps for reliable feeding
  • Mil Spec Type III Class II hard coat anodized black finish
  • Optimized for 15" and 16" rail systems

Compatibility

Chambered for .223 Remington and optimized for 15" and 16" rail systems. Features M4 feed ramps.

Frequently asked questions

What material is the STT-15 Pillar Upper Receiver made from?

It is machined from 7075-T651 aerospace-grade billet aluminum.

What finish does the receiver have?

It has a Mil Spec Type III Class II hard coat anodized black finish.

Which rail systems is this upper receiver optimized for?

It is optimized for 15" and 16" rail systems.

What feed ramps does the STT-15 use?

It features M4 feed ramps for reliable feeding.

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