Introducing the RUC DI Partial Upper. Bringing the highest quality parts to the market, while offering the best value as well. This partial upper utilizes a direct impingement operating system on our new and improved Rainier Arms Select barrel. Pairing up with our Urban Combat Rail to provide shooters with a rock solid handguard that can take any abuse. Throw in your favorite charging handle and bolt carrier group and you are good to go!

Upper Build:

• Rainier Arms Select 5.56 NATO Barrel Lengths:
  • 10.5"
  • 16"
• Rainier Arms Forged Upper Receiver
• Rainier Arms Urban Combat Rail Length:
  • 10.5": 9.5"
  • 16": 15"
• Rainier Arms Low Profile .750 Gas Block (Gasblock pinned)
• Rainier Arms FHV2 Flash Hider - Black Nitride

PLEASE NOTE: Barrel and Muzzle Device is not pinned and welded.