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Questions & Answers
what is the weight of the 16" flutted barrel in .308 Expert Answer

The fluted 16" .30 Rainier Arms AR Ultramatch MOD2 Barrel weighs 2 lb 10.2 oz.

by Ethan, Gear Expert, December 19, 2025
button or cut rifling Expert Answer

The Rainier Arms AR Ultramatch MOD2 .308 Barrels are button rifled.

by Hunter, Gear Expert, September 29, 2023
Customer Reviews
Helpful Positive Review
Darn good barrel for the price by Clark1sl, Verified Owner, May 31, 2024
Just bought the barrel a week ago and already put 100 rds through it so far. Very accurate barrel, more accurate than I am and the finish on it is amazing. I've been getting consistent .6 to .7 moa groupings using hornady match 178 grains and federal...
Read More...
1/1 found this helpful
Read 1 Review
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Product Info for Rainier Arms AR Ultramatch MOD2 .308 Barrel

Introducing their MOD2 UltraMatch barrel using the finest blank. Their goal is to mass produce them to bring them to market at the most competitive prices. They wanted the best balance between accuracy while keeping the weight down as much as possible.image

Specifications for Rainier Arms AR Ultramatch MOD2 .308 Barrel:

Manufacturer: Rainier Arms
Color: Silver
Fabric/Material: Stainless Steel
Caliber: .308 Winchester
Barrel Profile: M4
Gas System Length: Rifle Length
Barrel Twist Rate: 1-10
Flutes: No
Gun Make: AR Platform
Gun Model: AR-10
Condition: New
Firearms Threads Per Inch: 5/8x24

Package Contents:

  • Rainier Arms Ultramatch MOD2 .308 Barrel

Rainier Arms AR Ultramatch MOD2 .308 Barrel Orderable Models

List of Orderable Models

  • Rainier Arms Ultramatch MOD2 .308 Barrel, 16in Satin, 1-10 Twist, 5/8x24, Silver, Medium, RAB-UM2-308-16-R-FF-SAT , MPN: RAB-UM2-308-16-R-FF-SAT , UPC: 744985351671 , Code: 4ZM-ATB-S4-RAB-UM2-308-16-R-FF-SAT
  • Rainier Arms Ultramatch MOD2 .308 Barrel, 20in Satin, 1-10 Twist, 5/8x24, Silver, Medium, RAB-UM2-308-20-R-FF-SAT , MPN: RAB-UM2-308-20-R-FF-SAT , UPC: 744985351732 , Code: 4ZM-ATB-S4-RAB-UM2-308-20-R-FF-SAT
  • Rainier Arms Ultramatch MOD2 .308 Barrel, 16in Polished, 1-10 Twist, 5/8x24, Silver, Medium, RAB-UM2-308-16-R-FF-POL , MPN: RAB-UM2-308-16-R-FF-POL , UPC: 744985351664 , Code: 4ZM-ATB-S4-RAB-UM2-308-16-R-FF-POL
  • Rainier Arms Ultramatch MOD2 .308 Barrel, 18in Satin, 1-10 Twist, 5/8x24, Silver, Medium, RAB-UM2-308-18-R-FF-SAT , MPN: RAB-UM2-308-18-R-FF-SAT , UPC: 744985351688 , Code: 4ZM-ATB-S4-RAB-UM2-308-18-R-FF-SAT
  • Rainier Arms Ultramatch MOD2 .308 Barrel, 24in Satin, 1-10 Twist, 5/8x24, Silver, Medium, RAB-UM2-308-24-R-FF-SAT , MPN: RAB-UM2-308-24-R-FF-SAT , UPC: 744985351756 , Code: 4ZM-ATB-S4-RAB-UM2-308-24-R-FF-SAT

Rainier Arms AR Ultramatch MOD2 .308 Barrel Unavailable & Discontinued Models

List of Unorderable Models

  • USED, Rainier Arms Ultramatch MOD2 .308 Barrel, 18in Polish, 1-10 Twist, 5/8x24, Silver, Medium, RAB-UM2-308-18-R-FF-POL , MPN: RAB-UM2-308-18-R-FF-POL-EDEMO , Code: 4ZM-ATB-S4-RAB-UM2-308-18-R-FF-POL-EDEMO-US-U
  • DEMO, Rainier Arms Ultramatch MOD2 .308 Barrel, 24in Satin, 1-10 Twist, 5/8x24, Silver, Medium, RAB-UM2-308-24-R-FF-SAT , MPN: RAB-UM2-308-24-R-FF-SAT-DEMO , Code: 4ZM-ATB-S4-RAB-UM2-308-24-R-FF-SAT-DEMO
  • DEMO, Rainier Arms Ultramatch MOD2 .308 Barrel, 18in Satin, 1-10 Twist, 5/8x24, Silver, Medium, RAB-UM2-308-18-R-FF-SAT , MPN: RAB-UM2-308-18-R-FF-SAT-DEMO , Code: 4ZM-ATB-S4-RAB-UM2-308-18-R-FF-SAT-DEMO
  • USED Rainier Arms Ultramatch MOD2 .308 Barrel, 18in Satin, 1-10 Twist, 5/8x24, Silver, Medium, RAB-UM2-308-18-R-FF-SAT, EDEMO1, Condition Parts Only/Salvage, Wrong Product , MPN: RAB-UM2-308-18-R-FF-SAT-EDEMO1 , Code: 4ZM-ATB-S4-RAB-UM2-308-18-R-FF-SAT-EDEMO-WP-F
  • Rainier Arms Ultramatch MOD2 .308 Barrel, 18in Polish, 1-10 Twist, 5/8x24, Silver, Medium, RAB-UM2-308-18-R-FF-POL , MPN: RAB-UM2-308-18-R-FF-POL , UPC: 744985351695 , Code: 4ZM-ATB-S4-RAB-UM2-308-18-R-FF-POL
  • Rainier Arms Ultramatch MOD2 .308 Barrel, 24in Polished, 1-10 Twist, 5/8x24, Silver, Medium, RAB-UM2-308-24-R-FF-POL , MPN: RAB-UM2-308-24-R-FF-POL , UPC: 744985351763 , Code: 4ZM-ATB-S4-RAB-UM2-308-24-R-FF-POL
  • Rainier Arms Ultramatch MOD2 .308 Barrel, 20in Polished, 1-10 Twist, 5/8x24, Silver, Medium, RAB-UM2-308-20-R-FF-POL , MPN: RAB-UM2-308-20-R-FF-POL , UPC: 744985351725 , Code: 4ZM-ATB-S4-RAB-UM2-308-20-R-FF-POL
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