The Rainer Arms RUC Rifle DI – Urban Combat Optimized

This is the RUC Rifle DI from Rainier Arms. As you might have deduced from the name, the RUC DI is a direct impingement complete AR15. They describe it as the “…next step in our efforts to bring the highest quality rifles to the market…while offering the best value as well.”

The barrel is the heart of any good rifle, so RA chose their newly evolved and improved Select Barrel as the foundation for the RUC DI. It also utilizes the Rainier Urban Combat Rail (UCR) and boasts numerous other excellent features.

Which we shall explain if you will be so kind as to continue reading!

Take a look at this setup.

Rainier Arms Urban Combat Rail (UCR)

The RUC DI Rifle utilizes the RA Urban Combat Rail to provide shooters with a rock-solid handguard that can take any abuse thrown at it.

The UCR MLOK slots are positioned at the 3, 6 & 9 o’clock positions for adding user-defined rail sections. There are also anti-rotation QD sockets at the 3 o’clock & 9 o’clock positions. Other features include:

• CNC machined 6000 Aluminum
• Hard Coat Anodized Milspec Type III/Class 2
• 7075 Aluminum Barrel Nut
• Patent Pending 17-4PH Cored Stainless Steel Rail Mounting Hardware
• Anti-rotation tabs to easily align the rail to upper receiver
• *No Barrel nut shims are required for installation if you decide to switch things out
• 1.315? Interior Diameter

Avalanche ANC Charging Handle

A patented ambidextrous design, the Avalanche’s interchangeable handles offer an individualized look and feel. Made for fast and fluid operation, the Avalanche is built in Rainier’s own facility in Wichita, Kansas.

Avalanche features:

• 15% increase in wall thickness
• Reduced vent holes to minimize flex and improve rigidity
• Latch angles redesigned for improved locking and charging
• 7075 T6 Aluminum
• Weight 1.34 oz

FHAV2 Flash Hider

Rated 5 stars out of 5 stars by Rainier Arms customers, this is definitely, as one reviewer put it, a “bad azz flash hider.” The only downside to this muzzle device is how hard it is to keep them in stock.

FHAV2 Specs

• 303 Stainless with Black Nitride finish
• 1/2-28 thread & 1/2-36 thread pitches
• 2.26 length, .89 Diameter, 1.76 oz.

Rainier Arms Select Barrel

RA designed these as an affordable alternative to their match-grade barrels. They’re so confident about the quality they offer a 100% money-back guarantee within 90 days of purchase.

Barrel Specs

• Stainless Steel Match Grade Blank
• Twist: 1:7 | Thread Pitch: 1/2 x 28
• .750 Gas Block Seat
• Polyganol 5-groove rifling
• M4 Feed Ramps
• Proprietary Contour
• Nitride Finish

RUC DI Rifle Full Specs

Upper Receiver:

• RA Select 5.56 Barrel – 16 in.
• RA Forged Upper Receiver
• RA Urban Combat Rail – 15 in.
• RA Precision Bolt Carrier Group
• RA “Avalanche” Charging Handle
• RA Low Profile .750 Gas Block
• RA FHV2 Flash Hider

Lower Receiver:

• RA Forged Lower Receiver
• RA Modified Trigger Guard
• B5 Systems QD End Plate
• H1 Buffer – 3.9 oz
• Carbine Buffer Spring
• ALG Defense Quality Trigger
• B5 Systems Bravo Stock
• B5 Systems Type 23 Pistol Grip

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