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Rainier Arms AR Select 5.56 NATO Barrel Up to 28% Off w/ Free S&H — 3 models

Rainier Arms Select 5.56 NATO Barrel, 18in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-18-R-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 14.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-145-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 18in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-18-R-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 18in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-18-R-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 18in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-18-R-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 18in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-18-R-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 14.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-145-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 14.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-145-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 14.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-145-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 14.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-145-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 14.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-145-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 18in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-18-R-NF-BLK
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Rainier Arms Select 5.56 NATO Barrel, 18in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-18-R-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 14.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-145-M-NF-BLK
2 of 17 images
Rainier Arms Select 5.56 NATO Barrel, 14.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-145-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK
3 of 17 images
Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 18in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-18-R-NF-BLK
4 of 17 images
Rainier Arms Select 5.56 NATO Barrel, 18in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-18-R-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 18in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-18-R-NF-BLK
5 of 17 images
Rainier Arms Select 5.56 NATO Barrel, 18in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-18-R-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 18in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-18-R-NF-BLK
6 of 17 images
Rainier Arms Select 5.56 NATO Barrel, 18in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-18-R-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 18in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-18-R-NF-BLK
7 of 17 images
Rainier Arms Select 5.56 NATO Barrel, 18in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-18-R-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 14.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-145-M-NF-BLK
8 of 17 images
Rainier Arms Select 5.56 NATO Barrel, 14.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-145-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 14.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-145-M-NF-BLK
9 of 17 images
Rainier Arms Select 5.56 NATO Barrel, 14.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-145-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 14.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-145-M-NF-BLK
10 of 17 images
Rainier Arms Select 5.56 NATO Barrel, 14.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-145-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 14.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-145-M-NF-BLK
11 of 17 images
Rainier Arms Select 5.56 NATO Barrel, 14.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-145-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 14.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-145-M-NF-BLK
12 of 17 images
Rainier Arms Select 5.56 NATO Barrel, 14.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-145-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK
13 of 17 images
Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK
14 of 17 images
Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK
15 of 17 images
Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK
16 of 17 images
Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK
Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK
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Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK

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Questions & Answers
Customer Reviews
Helpful Positive Review
Rainier Arms select 18” by Greeks-R-Best, March 14, 2024
This is my third RA barrel and their quality is top notch, I highly recommend their barrels. OP listed the item in back stock and said it would be 4-6 weeks for delivery and delivered in about 4 weeks. They gave me about a 12% discount on the barrel ...
Read More...
1/1 found this helpful
Helpful Positive Review
10.5" excellence by Donald Sampson, Verified Owner, October 4, 2025
Bought the 10.5" select barrel to replace a no name barrel on my K&M Tactical 10.5" upper. I had no expectation of this barrel being anything but mediocre, since it is a 10.5" 5.56 barrel..... When I took it to the range, I was blown away. With a 1-4...
Read More...
1/1 found this helpful
Most Recent Reviews
So good I bought another by Donald Sampson, Verified Owner, December 29, 2025
I bought a 10.5" select barrel to replace a barrel on my pistol upper and liked it so much I bought this 18" select barrel for another rifle. It did not disappoint. Sub MOA at 100 yards. Rainier is now my go to barrel provider.
Read All 3 Reviews
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Product Info for Rainier Arms AR Select 5.56 NATO Barrel

Many have asked us to build a barrel with the same workmanship as our Match barrels while keeping it more affordable. They are able to reach our goal by sourcing a very high end barrel blank at an affordable price. They start off using a high precision match blank in 1:7 twist, use a 5 groove polygonal rifling, machine it to the highest quality, you have a barrel that is the best value, hands down, in the industry.image

Specifications for Rainier Arms AR Select 5.56 NATO Barrel:

Manufacturer: Rainier Arms
Color: Black
Fabric/Material: Stainless Steel
Caliber: 5.56x45mm NATO
Barrel Profile: M4
Gas Block Journal Size-Diameter: .750 in
Barrel Twist Rate: 1-7
Gun Make: AR Platform
Gun Model: AR-15
Condition: New
Firearms Threads Per Inch: 1/2x28

Package Contents:

  • Rainier Arms Select 5.56 NATO Barrel

What firearm models does the manufacturer say Rainier Arms AR Select 5.56 NATO Barrel is compatible with?

The manufacturer suggests that Rainier Arms AR Select 5.56 NATO Barrel is compatible with AR-15

Rainier Arms AR Select 5.56 NATO Barrel Orderable Models

List of Orderable Models

  • Rainier Arms Select 5.56 NATO Barrel, 18in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-18-R-NF-BLK , MPN: RAB-SEL-556-18-R-NF-BLK , UPC: 744985350940 , Code: 4ZM-ATB-S1-RAB-SEL-556-18-R-NF-BLK
  • Rainier Arms Select 5.56 NATO Barrel, 14.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-145-M-NF-BLK , MPN: RAB-SEL-556-145-M-NF-BLK , UPC: 744985350919 , Code: 4ZM-ATB-S1-RAB-SEL-556-145-M-NF-BLK
  • Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK , MPN: RAB-SEL-556-16-M-NF-BLK , UPC: 744985350926 , Code: 4ZM-ATB-S1-RAB-SEL-556-16-M-NF-BLK

Rainier Arms AR Select 5.56 NATO Barrel Unavailable & Discontinued Models

List of Unorderable Models

  • USED, Rainier Arms Select 5.56 NATO Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-M-NF-BLK , MPN: RAB-SEL-556-16-M-NF-BLK-EDEMO , Code: 4ZM-ATB-S1-RAB-SEL-556-16-M-NF-BLK-EDEMO-RE-A
  • Rainier Arms Select 5.56 NATO Barrel, 10.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-105-C-NF-BLK , MPN: RAB-SEL-556-105-C-NF-BLK , UPC: 744985350889 , Code: 4ZM-ATB-S1-RAB-SEL-556-105-C-NF-BLK
  • Rainier Arms Select 5.56 NATO Barrel, 12.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-125-C-NF-BLK , MPN: RAB-SEL-556-125-C-NF-BLK , UPC: 744985350902 , Code: 4ZM-ATB-S1-RAB-SEL-556-125-C-NF-BLK
  • Rainier Arms Select 5.56 NATO Barrel, 11.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-115-C-NF-BLK , MPN: RAB-SEL-556-115-C-NF-BLK , UPC: 744985350896 , Code: 4ZM-ATB-S1-RAB-SEL-556-115-C-NF-BLK
  • USED Rainier Arms Select 5.56 NATO Barrel, 10.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-105-C-NF-BLK, EDEMO1, Condition Parts Only/Salvage, Wrong Product , MPN: RAB-SEL-556-105-C-NF-BLK-EDEMO1 , Code: 4ZM-ATB-S1-RAB-SEL-556-105-C-NF-BLK-EDEMO-WP-F
  • Open Box, Dealer Demo, Rainier Arms Select 5.56 NATO Barrel, 10.5in, 1-7 Twist, 1/2x28, Black, Small, RAB-SEL-556-105-C-NF-BLK , MPN: RAB-SEL-556-105-C-NF-BLK-DMO , Code: 4ZM-ATB-S1-RAB-SEL-556-105-C-NF-BLK-DMO
  • Rainier Arms Select 5.56 NATO Dissipator Barrel, 16in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-16-R-NF-BLK , MPN: RAB-SEL-556-16-R-NF-BLK , UPC: 744985350933 , Code: 4ZM-ATB-S1-RAB-SEL-556-16-R-NF-BLK
  • Rainier Arms Select 5.56 NATO M16A1 Barrel, 20in, 1-7 Twist, 1/2x28, Black, Medium, RAB-SEL-556-20-R-M16A1-NF-BLK , MPN: RAB-SEL-556-20-R-M16A1-NF-BLK , UPC: 744985350957 , Code: 4ZM-ATB-S1-RAB-SEL-556-20-R-M16A1-NF-BLK
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