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Rainier Arms, LLC

Rainier Arms UltraMatch 6.5 Grendel Intermediate Barrel - 18

Rainier Arms UltraMatch 6.5 Grendel Intermediate Barrel - 18
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Availability: Out of stock




Introducing our 6.5 Grendel barrel using the finest blank (Shilen). Our goal is to mass produce them to bring them to market at the most competitive prices. Our UltraMatch Barrels start out as Shilen blanks and contoured to our specifications. We wanted the best balance between accuracy while keeping the weight down as much as possible. Each barrel comes threaded.


  • Stainless Steel Match Grade Shilen Blank
  • Length: 18"
  • Twist: 1:8
  • Gas Block Seat: .750 Diameter
  • Thread Pitch: 5/8X24
  • 6.5 Grendel
  • Intermediate Gas System
  • Ratchet 4 groove
  • M4 Feed Ramps
  • Proprietary Contour
  • Bead Blasted Finish
  • Weight: 2 lbs 8.9oz


Barrel Care

For your convenience we have published barrel care recommendations for this product. The instructions are in Adobe Acrobat's Portable Document Format (PDF). You will need Adobe Acrobat Reader version 5.0 or higher to view and print the instructions.

If you do not have Adobe's Acrobat Reader, you can download a free copy at

Additional Info

Additional Info

SKU RAB-U-65Grendel-I18-SS
Manufacturer Rainier Arms, LLC
Finish finish
Barrel Length 18"
Caliber 6.5 Grendel
Configuration 5/8-24 Thread
Option No
Gas Length Intermediate
Height No
Rail Length No
Mount No
Profile No
Reticle No
Co Witness No
Size No


Customer Reviews (1)

Dead Nutz Accurate!Review by
I used this barrel along with a jp grendel bolt and it has been amazing with hornady 123 amax ammo along with ppu 120 ammo (sadly discontinued). I am sold on RA barrels. Keep in mind this is a type 2 chamber. Nothing to be scared of if you have a type 2 bolt (jp bolts are type 2chamber). I am waiting for a 12.5 RA barrel that is out of stcok. (Posted on 10/2/2016)

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