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Rainier Arms RUC PRO Mk1 5.56 NATO Riflespeed Partial Upper Receiver - 12"

AR-15 Partial Upper Receiver

Out of stock


Satisfaction Guarantee

We are so confident in our barrels that we offer a 100% money back guarantee within 90 days of purchase. If our barrels don’t meet or exceed your expectations, for any reason, return it for a full refund.

$750.00

Introducing the RUC PRO MK1 Partial Upper. Bringing the highest quality parts to the market, while offering the best value as well. This partial upper utilizes a Riflespeed adjustable gas control assembly on our new and improved Rainier Arms Select barrel. Pairing up with new PRO series MK1 handguard 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 - 12"
  • Rainier Arms Forged Upper Receiver
  • Rainier Industries PRO Series MK1 Handguard - 10.7"
  • Riflespeed AR15/AR10 Adjustable .750 Gas Control Assembly - 1.9"
  • SilencerCo ASR 5.56mm Flash Hider - 1/2x28



Please NOTE: BCG and Charging Handle NOT Included.

More Information
SKU RA-RUC-PRO-MK1-RS-12-PU
Product Type AR-15 Partial Upper Receiver
Manufacturer Rainier Arms, LLC
Gas Block Diameter .750"
Thread Pitch 1/2x28 (.22 cal)
Color Black
Rail Length 10.7"
Barrel Length 12"
Caliber 5.56 NATO
Threaded Yes

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