PRI Flat Top AR-15 Upper Receiver Assembly

Manufactured by Precision Reflex, Inc.
SKU: 05-556FR
MPN: 05-556FR
Manufactured by Precision Reflex, Inc.
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PRI stands for Precision Reflex Incorporated. Those who know and have used PRI products understand that the name isn’t just for show. PRI rifles are some of the most accurate, combat proven AR-15s ever made, and their receivers are built to truly exacting standards as a result.

In the early years of the GWOT, PRI’s Mk12 SPR was designed to fill the role between M4 carbines and SR25 sniper systems. Heralded for reliability and accuracy in some of the most demanding environments on earth, the Mk12 earned its place in the SOCOM arsenal. Because they were building for extreme precision, PRI became known for their standards of quality for receiver sets.

PRI receivers are still every bit the quality soldiers came to know and love, so they make a perfect starting point for any SPR build. This Flat Top Upper Receiver is made from T6 7075 forged aluminum and is machined to MIL SPEC standards. Each receiver comes with a dust cover and forward assist. This version of the PRI upper receiver has a black anodized finish.

  • Flat Top Rail
  • Dust Cover
  • Forward Assist
  • Black Anodized
  • Weighs 9 Oz
  • Marked with PRI Logo
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AssemblyAssembled Uppers
BrandPrecision Reflex, Inc.
FinishHardcoat Anodized
Forward AssistAssembled with Forward Assist
Port DoorAssembled with Port Cover
Receiver Material7075-T6 Aluminum

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

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