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Rainier Arms RUC PRO 5.56 Nato DI Rifle - 16"

AR-15 Rifle

In stock
Only 2 left

FFL Required Before Shipping.

Please have your dealer email a copy of their FFL to [email protected] or fax it to 253-218-2998, referencing your name and order number.


The RUC Pro is Rainier Arms' next iteration of our RUC rifles, known for being accurate, dependable rifles. The same forged receiver set you know and love is at the heart of this new rifle, but with a sleeker and more subtle roll mark that gives the rifle a fresh new look.

We didn’t stop with just looks, with this new rifle you’ll be getting our new Pro series handguard, with an improved barrel nut and wider hardware, you now have a more rigid lock-up. We chose a more streamlined design based on the same thought processes as our lower. M-Lok at the 2,3,6,9 and 10 o’clock positions gives you plenty of options for mounting your accessories and ventilation holes at the 5 and 7 o’clock positions to help dissipate heat.  

Our new barrel profile gives balance to the rifle, having a heavier profile towards the chamber and a consistent taper towards the muzzle. With that balance, a 4150 Chromoly-vanadium blank gives the end user a barrel that will last a lifetime of use, wrapped up nicely with a pinned in place gas block.

New for this edition of the RUC is the Vltor A5 buffer system with a Sprinco buffer spring that will out-last the rest of the gun, giving the user an improvement over the typical mil-spec system. 

Your rifle is only as strong as the weakest link. We at Rainier Arms spent the time to research and source reliable parts. The goal was to build a reliable rifle that will stand the test of time. 

Upper Build:

  • Rainier Arms RUC Barrel - 16" 1:7 Twist

  • Rainier Arms Forged Upper Receiver

  • Rainier Arms Pro Series M-LOK Handguard - 15"

  • Rainier Arms AR-15 Precision Match Grade BCG - Nitride

  • Vltor Ambi Charging Handle

  • Rainier Arms Low Profile Gas Block

  • Rainier Industries Flash Hider 

Lower Build:

  • Rainier Arms Forged Lower Receiver

  • Rainier Arms Modified Trigger Guard

  • Rainier Industries AR-15 Extended Takedown / Pivot Pin Set

  • Vltor 7 Position Receiver Extension - A5

  • B5 Systems QD End Plate

  • Forward Controls Design CN5F A5 Billet Castle Nut

  • Sprinco M16 Rifle Length Standard Power Buffer Spring - Green

  • Vltor A5-H1 Buffer 4.56 oz

  • Forward Controls Design Ambidextrous 50 Degree Safety Selector

  • Centurion Arms AST Advanced Sniper Trigger - 2-Stage

  • B5 Systems Bravo Stock

  • Magpul MOE K2 Grip


  • 1x Magpul PMAG GEN 2 30-Round Magazine

  • 1x Savior Equipment Urban Warfare Double Rifle Case or Rainier Arms Project Cordite Rifle Case

Weight: 7 lbs 4.3 oz

More Information
Product Type AR-15 Rifle
Manufacturer Rainier Arms, LLC
Gas Block Diameter .750"
Thread Pitch 1/2x28
Twist Rate 1:7
Color Black
Gas Length Mid
Rail Length 15"
Mount M-LOK
Barrel Length 16"
Caliber 5.56 NATO

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