Dark mode is

Rainier Arms Piston RUC MOD 3.5 Rifle - 14.5 Black

Out of stock

Rainier Arms Piston RUC MOD 3.5 Rifle - 14.5 Black


We are excited to introduce to you our new RUC MOD 3.5 with Superlative Arms .750 Adjustable Piston System. When we first introduced our RUC MOD 1 and MOD 2, our focus was to develop a rifle that integrated a lightweight design while using the highest quality components. Building on the solid foundation of our predecessors, our new RUC MOD 3.5 is a light weight, high quality and high performace rifle that is heavy on value. It features our new Rainier Arms 14" Night Rail, XTC 2.0 compensator, Avalanche MOD2 Charging Handle, and RA Selector Switch. We have also included MBUS Pro for the RUC Mod 3.5!

Upper Parts:

  • RA Mountain Chrome Moly 5.56mm 14.5" Barrel Nitride
  • 1 in 7" twist
  • Extended M4 Feed Ramps
  • MPI/HP tested Bolt
  • 1/2x28 threads
  • Mid length gas system
  • Superlative Arms .750 Adjustable Piston System
  • Rainier Arms Avalanche MOD2 Charging Handle
  • RA Forged A4 upper receiver
  • RA Night Rail 14"
  • Rainier Arms Compensator - XTC 2.0
  • Back Up Front & Rear Sights - MBUS Pro

Lower Parts:

  • RA Forged Lower
  • Mil-Spec 6 position receiver extension
  • H Buffer
  • B5 Systems Bravo Stock
  • Magpul MOE+ Grip
  • ALG QMS trigger
  • Rainier Arms Selector Switch - Standard 90 Degree/ Short (45 Degree).
  • Fortis QD end plate

Additional info:

  • One 30 rd Hexmag magazine where legal
  • Hard Case Included
  • Weight 6 lbs 10oz

FFL Required Before Shipping.

Please have your dealer email their license to [email protected] or they can also fax it in. Please give us a few days to process the information. 

More Information
SKU RUC-P MOD 3.5 - 14.5 BLK
Manufacturer Rainier Arms, LLC
Gas Length Mid
Finish Black
Barrel Length 14.5"
Caliber 5.56