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Questions & Answers
Will this work on a CMMG Guard? Expert Answer

The Rainier Arms AR UltraMatch MOD2 9mm Barrel will work with a CMMG AR15 Handguard.

by Hunter, Gear Expert, January 25, 2023
Will this barrel work on an aero precision epc9 build? Expert Answer

Yes, the Rainier Arms AR UltraMatch MOD2 9mm Barrel will be compatible with your Aero Precision EPC9 PCC build.

by Ethan, Gear Expert, October 31, 2022
Customer Reviews
Most Recent Reviews Rainer 6" barrel by Pete, Verified Owner, May 17, 2025
Ran it for the first time yesterday worked great and had good quality
Most Recent Reviews NICE BARREL by Shooter, Verified Owner, May 16, 2025
Very nice finish, easy to install, and seems pretty accurate so far.
Most Recent Reviews Rainier Arms 9mm barrel by rw, December 20, 2023
Great barrel. Nicely made, works perfectly Exactly what I was looking for.
Read All 3 Reviews
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Product Info for Rainier Arms AR UltraMatch MOD2 9mm Barrel

Introducing their 9x19 mm barrel using the finest blank. Their goal is to mass produce them to bring them to market at the most competitive prices. Their UltraMatch Barrels are contoured to their specifications.image

Specifications for Rainier Arms AR UltraMatch MOD2 9mm Barrel:

Manufacturer: Rainier Arms
Fabric/Material: Stainless Steel
Caliber: 9mm Luger
Barrel Profile: M4
Gas Block Journal Size-Diameter: .750 in
Threads per Inch: 1/2x28
Barrel Twist Rate: 1-10
Flutes: Yes
Gun Make: AR Platform
Gun Model: AR-15
Weight: 7.9 oz
Condition: New

Package Contents:

  • Rainier Arms UltraMatch MOD2 9mm Barrel

Rainier Arms AR UltraMatch MOD2 9mm Barrel Orderable Models

List of Orderable Models

Rainier Arms UltraMatch MOD2 9mm Barrel, 5in Nitride, 1-10 Twist, 1/2x28, Black, Small, RAB-UM2-9MM-5-FF-BLK , MPN: RAB-UM2-9MM-5-FF-BLK , UPC: 744985351565 , Code: 4ZM-ATB-CPO39-RAB-UM2-9MM-5-FF-BLK
Rainier Arms UltraMatch MOD2 9mm Barrel, 6in Nitride, 1-10 Twist, 1/2x28, Black, Small, RAB-UM2-9MM-6-FF-BLK , MPN: RAB-UM2-9MM-6-FF-BLK , UPC: 744985351596 , Code: 4ZM-ATB-CPO39-RAB-UM2-9MM-6-FF-BLK
Rainier Arms UltraMatch MOD2 9mm Barrel, 6in Polished, 1-10 Twist, 1/2x28, Silver, Small, RAB-UM2-9MM-6-FF-POL , MPN: RAB-UM2-9MM-6-FF-POL , UPC: 744985351602 , Code: 4ZM-ATB-CPO39-RAB-UM2-9MM-6-FF-POL
Rainier Arms UltraMatch MOD2 9mm Barrel, 10.7in Polished, 1-10 Twist, 1/2x28, Silver, Small, RAB-UM2-9MM-107-FF-POL , MPN: RAB-UM2-9MM-107-FF-POL , UPC: 744985351626 , Code: 4ZM-ATB-CPO39-RAB-UM2-9MM-107-FF-POL
Rainier Arms UltraMatch MOD2 9mm Barrel, 6in Satin, 1-10 Twist, 1/2x28, Silver, Small, RAB-UM2-9MM-6-FF-SAT , MPN: RAB-UM2-9MM-6-FF-SAT , UPC: 744985351619 , Code: 4ZM-ATB-CPO39-RAB-UM2-9MM-6-FF-SAT
Rainier Arms UltraMatch MOD2 9mm Barrel, 4in Polished, 1-10 Twist, 1/2x28, Silver, Small, RAB-UM2-9MM-4-FF-POL , MPN: RAB-UM2-9MM-4-FF-POL , UPC: 744985351541 , Code: 4ZM-ATB-CPO39-RAB-UM2-9MM-4-FF-POL
Rainier Arms UltraMatch MOD2 9mm Barrel, 10.7in Satin, 1-10 Twist, 1/2x28, Silver, Small, RAB-UM2-9MM-107-FF-SAT , MPN: RAB-UM2-9MM-107-FF-SAT , UPC: 744985351633 , Code: 4ZM-ATB-CPO39-RAB-UM2-9MM-107-FF-SAT
Rainier Arms UltraMatch MOD2 9mm Barrel, 4in Satin, 1-10 Twist, 1/2x28, Silver, Small, RAB-UM2-9MM-4-FF-SAT , MPN: RAB-UM2-9MM-4-FF-SAT , UPC: 744985351558 , Code: 4ZM-ATB-CPO39-RAB-UM2-9MM-4-FF-SAT
Rainier Arms UltraMatch MOD2 9mm Barrel, 5in Satin, 1-10 Twist, 1/2x28, Silver, Small, RAB-UM2-9MM-5-FF-SAT , MPN: RAB-UM2-9MM-5-FF-SAT , UPC: 744985351589 , Code: 4ZM-ATB-CPO39-RAB-UM2-9MM-5-FF-SAT
Rainier Arms UltraMatch MOD2 9mm Barrel, 5in Polished, 1-10 Twist, 1/2x28, Silver, Small, RAB-UM2-9MM-5-FF-POL , MPN: RAB-UM2-9MM-5-FF-POL , UPC: 744985351572 , Code: 4ZM-ATB-CPO39-RAB-UM2-9MM-5-FF-POL
Rainier Arms UltraMatch MOD2 9mm Barrel, 16in Polished, 1-10 Twist, 1/2x28, Silver, Medium, RAB-UM2-9MM-16-FF-POL , MPN: RAB-UM2-9MM-16-FF-POL , UPC: 744985351640 , Code: 4ZM-ATB-CPO39-RAB-UM2-9MM-16-FF-POL
Rainier Arms UltraMatch MOD2 9mm Barrel, 16in Satin, 1-10 Twist, 1/2x28, Silver, Medium, RAB-UM2-9MM-16-FF-SAT , MPN: RAB-UM2-9MM-16-FF-SAT , UPC: 744985351657 , Code: 4ZM-ATB-CPO39-RAB-UM2-9MM-16-FF-SAT

Rainier Arms AR UltraMatch MOD2 9mm Barrel Unavailable & Discontinued Models

List of Unorderable Models

DEMO, Rainier Arms UltraMatch MOD2 9mm Barrel, 16in Polished, 1-10 Twist, 1/2x28, Silver, Medium, RAB-UM2-9MM-16-FF-POL , MPN: RAB-UM2-9MM-16-FF-POL-DEMO , Code: 4ZM-ATB-CPO39-RAB-UM2-9MM-16-FF-POL-DEMO
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