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Due to Measure 114, Rainier Arms will prioritize order shipments to Oregon state residents.

Rainier Arms / Rellim Arms AR-15 300BLK Take Down Upper Receiver Assembly - 8"

AR-15 Complete Upper Receiver

In stock
Only 3 left

Ships from Distribution Facility



Rainier Arms / Rellim Arms AR-15 300BLK Take Down Upper Receiver Assembly - 8"

$1,199.99
Rainier Arms Exclusive

Build Specs:

  • Rellim Arms Proprietary Receiver/QD Barrel Nut
  • Rainier Arms Upper Receiver
  • Rainier Arms Urban Combat Rail - 7"
  • Rainier Arms AR-15 Precision Match Grade BCG - Nitride
  • Rainier Arms Select 300BLK Barrel - 8"
  • Rainier Arms Proprietary Avalanche Charging Handle
  • Superlative Adjustable Gas Block
  • A2 Flash Hider
  • Weight: 3 lbs 1.7 oz


More Information
SKU RA-TDURA-300-8
Product Type AR-15 Complete Upper Receiver
Manufacturer Rainier Arms, LLC
Gas Block Diameter .750"
Color Black
Gas Length Pistol
Rail Length 7"
Finish Anodize
Barrel Length 8"
Caliber 300 Blackout
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