Aero Precision M5 12.5" Barreled .308 Upper Receiver with Atlas R-ONE Rail - Black

Manufactured by Aero Precision
SKU: APAR538704M49
MPN: APAR538704M49
Manufactured by Aero Precision
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NOTE: Limit 1 per household. Quantities exceeding 1 will not allow checkout.



NOTE: There are various specs for the AR-308 platform. For best fit and function, we recommend using this upper with Aero Precision’s M5 Gen2 .308 Stripped Lower Receiver (SKU: APAR308003).

NOTE: Does not include bolt carrier group or charging handle.

Known for their excellence in product manufacturing, Aero Precision’s 12.5" .308 WIN M5 Barreled Upper Receiver is a great start for an AR-308 pistol or registered SBR that's as compact as it is hard hitting. Equipped with a reliable carbine length gas system and lightweight ATLAS R-ONE free float M-LOK handguard, this is a high quality barreled upper you don't want to pass up.

  • 12.5" 41V50 steel barrel
  • Carbine length gas system
  • 5/8x24 thread pitch
  • 1:10 twist rate
  • DPMS-pattern barrel extension
  • Ships with A2 flash hider
  • 12" Atlas R-ONE M-LOK Handguard
  • Made in the U.S.A. in Tacoma, Washington
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AssemblyBarreled Assemblies
Barrel ContourMedium
Barrel Length12.5
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandAero Precision
Caliber Gauge.308 Win

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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