+1-800-504-5897 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

New! CMC Triggers AR-15 Ultimate Duty 5.56 Nato Threaded AR Barrel w/Gas Block/Gas Tube CMC-BBL-556-125C-GB Color: Black, Finish: Nitride, Fabric/Material: Steel, $10.00 Off w/ Free S&H

Photo Coming Soon!
Government Restriction Government Restriction
You May Also Like
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
(63)
List: $13.95 $12.75 Save Up to $1.20
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
(60)
List: $18.95 $17.95 Save Up to $1.00
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
(43)
List: $15.95 $14.75 Save Up to $1.20
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Medium 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, Medium Coyote Tan, 1 Pack, Polymer, MAG556-MCT-30RD
(60)
List: $18.95 $17.95 Save Up to $1.00
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
(27)
List: $15.95 $14.95 Save Up to $1.00
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Medium 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, Medium Coyote Tan, 1 Pack, Polymer, MAG557-MCT-30RD
(43)
List: $15.95 $14.75 Save Up to $1.20
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
(14)
List: $16.95 $15.75 Save Up to $1.20
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
(13)
List: $23.95 $22.45 Save Up to $1.50
Best Rated Strike Industries AR-15 .223 Remington/5.56 NATO Rifle Magazine, 33 Round, Smoke Gray, 1 Pack, Polymer, Smoke, 0, SI-AR-MAG-33RD
Strike Industries AR-15 .223 Remington/5.56 NATO Rifle Magazine, 33 Round, Smoke Gray, 1 Pack, Polymer, Smoke, 0, SI-AR-MAG-33RD
(11)
List: $35.25 $17.99 Save Up to 49%
On Sale 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
(117)
List: $14.99 $10.61 Save Up to 29%
Questions & Answers

New Product

See more new CMC Triggers Gun Parts items
We’ve just added this new product to OpticsPlanet. Be the first to get it!
Color:
Black
Finish:
Nitride
Caliber:
5.56x45mm NATO
Barrel Length:
12.5 in
Barrel Profile:
Government
Gas System Length:
Carbine Length
Gas Block Journal Size-Diameter:
.750 in
Barrel Twist Rate:
1-7
Barrel Material:
4150 Chrome Moly Vanadium
Flutes:
No
Gun Make:
AR Platform
Gun Model:
AR-15
Gas Block Journal Size-Length:
1.13 in
Gun Type:
Rifle
Firearms Threads Per Inch:
1/2x28

Code: 1TA-ATB-C3CTB10-CMC-BBL-556-125C-GB

MPN: CMC-BBL-556-125C-GB

UPC: 810169561836

List: $149.99Save $10.00
$139.99

Product Info for CMC Triggers AR-15 Ultimate Duty 5.56 Nato Threaded AR Barrel w/Gas Block/Gas Tube

An extra inch adds up more than you'd think. At 12.5 inches, this carbine-gas barrel gives you better velocity than an 11.5, and it still tucks under most short handguards. Chambering is 5.56 NATO with a 1:7 twist. The government profile is non-fluted, so there's plenty of steel to soak up heat during longer strings of fire. Black nitride protects the bore and the outer surfaces. The muzzle is threaded 1/2x28 TPI for standard devices. Gas block and gas tube come with it, ready to install.image

Specifications for CMC Triggers AR-15 Ultimate Duty 5.56 Nato Threaded AR Barrel w/Gas Block/Gas Tube:

Manufacturer: CMC Triggers
Color: Black
Finish: Nitride
Fabric/Material: Steel
Caliber: 5.56x45mm NATO
Barrel Length: 12.5 in
Barrel Profile: Government
Gas System Length: Carbine Length
Gas Block Journal Size-Diameter: .750 in
Barrel Twist Rate: 1-7
Barrel Material: 4150 Chrome Moly Vanadium
Flutes: No
Gun Make: AR Platform
Gun Model: AR-15
Gas Block Journal Size-Length: 1.13 in
Gun Type: Rifle
Firearms Threads Per Inch: 1/2x28

Package Contents:

  • CMC Triggers AR-15 Ultimate Duty 5.56 Nato Threaded AR Barrel w/Gas Block/Gas Tube
  • Includes gas block and gas tube

What firearm models does the manufacturer say CMC Triggers AR-15 Ultimate Duty 5.56 Nato Threaded AR Barrel w/Gas Block/Gas Tube is compatible with?

The manufacturer says that CMC Triggers AR-15 Ultimate Duty 5.56 Nato Threaded AR Barrel w/Gas Block/Gas Tube is compatible with AR-15

CMC Triggers AR-15 Ultimate Duty 5.56 Nato Threaded AR Barrel w/Gas Block/Gas Tube Orderable Models

List of Orderable Models

  • CMC Triggers AR-15 Ultimate Duty 5.56 Nato Threaded AR Barrel w/Gas Block/Gas Tube, 12.5in, 1-7 Twist, Carbine Length, 1/2x28 TPI, Nitride, Black, Medium, CMC-BBL-556-125C-GB , MPN: CMC-BBL-556-125C-GB , UPC: 810169561836 , Code: 1TA-ATB-C3CTB10-CMC-BBL-556-125C-GB
Compare (0)
1 item has been added
Add at least two items to compare
Last updated 2026-10-06 UTC.