+1-800-504-5897 Live Chat Help Center Check Order Status
About Us Policies Reviews How To
Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel w/ Free Shipping — 2 models

Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 12.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-125-M-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 10.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-105-C-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 10.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-105-C-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 12.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-125-M-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 10.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-105-C-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 12.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-125-M-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 10.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-105-C-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 12.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-125-M-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 10.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-105-C-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 12.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-125-M-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 10.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-105-C-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 12.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-125-M-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 12.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-125-M-NF-BLK
1 of 12 images
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 12.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-125-M-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 10.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-105-C-NF-BLK
2 of 12 images
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 10.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-105-C-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 10.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-105-C-NF-BLK
3 of 12 images
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 10.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-105-C-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 12.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-125-M-NF-BLK
4 of 12 images
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 12.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-125-M-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 10.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-105-C-NF-BLK
5 of 12 images
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 10.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-105-C-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 12.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-125-M-NF-BLK
6 of 12 images
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 12.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-125-M-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 10.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-105-C-NF-BLK
7 of 12 images
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 10.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-105-C-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 12.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-125-M-NF-BLK
8 of 12 images
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 12.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-125-M-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 10.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-105-C-NF-BLK
9 of 12 images
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 10.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-105-C-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 12.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-125-M-NF-BLK
10 of 12 images
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 12.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-125-M-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 10.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-105-C-NF-BLK
11 of 12 images
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 10.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-105-C-NF-BLK
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 12.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-125-M-NF-BLK
12 of 12 images
Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 12.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-125-M-NF-BLK

Tap Tap to Zoom

Government Export Restriction Government Export Restriction
Government Restriction Government Restriction
You May Also Like
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI556BLK-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI556BLK-30RD
(44)
List: $32.43 $17.99 Save Up to 45%
Best Rated Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI571BLK-30RD
Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI571BLK-30RD
(47)
List: $24.99 $12.99 Save Up to 48%
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI557BLK-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI557BLK-30RD
(28)
List: $27.99 $14.99 Save Up to 46%
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 20 Round, Black, 1 Pack, Polymer, MAG560BLK-20RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 20 Round, Black, 1 Pack, Polymer, MAG560BLK-20RD
(19)
List: $30.79 $21.49 Save Up to 30%
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Coyote Tan, 1 Pack, Polymer, MAG557-MCT-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Coyote Tan, 1 Pack, Polymer, MAG557-MCT-30RD
(28)
List: $24.95 $14.99 Save Up to 40%
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Coyote Tan, 1 Pack, Polymer, MAG556-MCT-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Coyote Tan, 1 Pack, Polymer, MAG556-MCT-30RD
(44)
List: $32.43 $17.99 Save Up to 45%
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Remington, 40 Round, Black, 1 Pack, Polymer, MGMPI233BLK-40RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Remington, 40 Round, Black, 1 Pack, Polymer, MGMPI233BLK-40RD
(10)
List: $41.46 $29.49 Save Up to 29%
Best Rated Strike Industries Rifle Magazine, AR-15, .223 Remington/5.56 NATO, 33 Round, Smoke Gray, 1 Pack, Polymer, SI-AR-MAG-33RD
Strike Industries Rifle Magazine, AR-15, .223 Remington/5.56 NATO, 33 Round, Smoke Gray, 1 Pack, Polymer, SI-AR-MAG-33RD
(10)
List: $26.99 $17.99 Save Up to 33%
Best Rated Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI570BLK-30RD
Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI570BLK-30RD
(12)
List: $27.33 $15.99 Save Up to 41%
Best Rated PMC Ammunition 556K X-Tac, 5.56x45mm NATO, 62 grain, Light Armor Piercing, Brass, Centerfire Rifle Ammo, 20, 5.56
PMC Ammunition 556K X-Tac, 5.56x45mm NATO, 62 grain, Light Armor Piercing, Brass, Centerfire Rifle Ammo, 20, 5.56
(107)
List: $14.99 $11.29 Save Up to 25%
Questions & Answers
2 Models Available
Barrel Length
All
Weight
All
Search
Click to select this item for your bundle offer!

Buy Together and Save

As low as $325.49
You Save Up to 17%
OP Bucks$6.51

Product Info for Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel

The Mountain MOD 3 barrel is our offering for those shooters looking for the durability and heat resistance that nitrided 4150 CMV barrels provide, but are not interested in the extra weight or cost of our fluted offerings. While these barrels will not reject heat in the same way our fluted Mountain barrels well, they're still going to be excellent options for the budget minded shooter looking for a more general purpose barrel.image

Our Craftsmanship

Rainier barrels are meticulously designed and machined by precision gunsmiths. Our barrels are turned the same way true artisans have made premium rifle barrels for over a century. Each barrel has hand-cut chambers and crowns with the attention to detail that can only come from highly trained human intervention. While most companies strive for faster production time to cut costs, we strive for perfection. There are no shortcuts with our barrels, period.

We will go toe to toe with anyone and win.

Specifications for Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel:

Manufacturer: Rainier Arms
Color: Black
Fabric/Material: Stainless Steel
Caliber: 5.56x45mm NATO
Gas System Length: Carbine Length
Gas Block Journal Size-Diameter: .750 in
Barrel Material: Stainless Steel
Flutes: No
Gun Make: AR Platform
Gun Model: AR-15
Firearms Threads Per Inch: 1/2x28

Package Contents:

  • Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel

What firearm models does the manufacturer say Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel is compatible with?

The manufacturer says that Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel is compatible with AR-15

Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel Orderable Models

List of Orderable Models

  • Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 12.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-125-M-NF-BLK , MPN: RAB-CMV-556-125-M-NF-BLK , UPC: 744985352869 , Code: 4ZM-ATB-GHBNL1-RAB-CMV-556-125-M-NF-BLK
  • Rainier Arms Mountain MOD3 Series 5.56 NATO AR-15 Threaded Barrel, 10.5 inch, Carbine Length, 1-8 Twist, 1/2x28, Black, Medium, RAB-CMV-556-105-C-NF-BLK , MPN: RAB-CMV-556-105-C-NF-BLK , UPC: 744985352852 , Code: 4ZM-ATB-GHBNL1-RAB-CMV-556-105-C-NF-BLK
Compare (0)
1 item has been added
Add at least two items to compare