Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Enjoy free shipping during the holidays! 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 Extended FREE RETURNS

We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later). We'll even cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Government Export Restriction Government Export Restriction
Government Restriction Government Restriction
Questions & Answers
What is the weight of the barrel?

The 5.56 barrel weighs 19.1 ounces, 308 barrel weighs 31.5 ounces and the Creedmore barrel weighs 35.4 ounces as Per 2A Armament's web sites specs

by Robert Davis, Verified Owner, December 12, 2019
Whats the gas block diameter for 2CU-BRI-2ALWBRL-2A-C556L16PB-1, the 16inch 556 barrel?

The 5.56 barrel has a mid-length gas system, .078" diameter gas port, .625" gas block diameter, and a 1.1" gas block journal length.

by Brandon, Verified Owner, February 25, 2021
Customer Reviews
Helpful Positive Review
2a 308 barrel by KC, Verified Owner, May 22, 2018
Fit and finish are great. I used their upper and lower receivers and it all went together as you would expect. OpticsPlanet was great as well. I will be buying from them again. They keep you updated all along the way.
2/2 found this helpful
Helpful Positive Review
Lightweight Barrel by PorkChop, Verified Owner, January 18, 2018
I reviewed several barrels before purchasing this barrel. My decision came down to this barrel and the Faxon barrel. It was really a hard choice between the two. I chose this barrel due to me having purchased 2A Armament items previously. They ma...
Read More...
2/4 found this helpful
Helpful Positive Review
Credmoor barrel rocks! by Drcooke32, February 26, 2018
This was my barrel of choice for my first ar10. Wanted something light but accurate. This thing ends up shooting sub moa-could not be happier. Fit and finish were spot on. My rifle feels like an Ar10 heavy barrel. Ammo feeds easily no problems wha...
Read More...
3/3 found this helpful
Helpful Positive Review
I bought the a RBCG to run suppressed and WOW! Very well designed!! Excellent weight & recoil deduction!! Outstanding company with excellent products and outstanding customer service!!! Breck provided an amazing customer service experience & he was ...
Read More...
1/1 found this helpful
Helpful Positive Review
Great barrel by Boomer95, November 3, 2018
As good as advertised. Light and effective. A great barrel for a light weight build. No issues what so ever at the range. I like the fact that it is 1:8 twist allows for the heavier ballistics. I would recommend this barrel for any type of light...
Read More...
2/3 found this helpful
Most Recent Reviews
Very light barrel by D. Stewart, Verified Owner, February 9, 2017
This barrel is very nice. lightest 308 barrel on the market. high quality machining. accuracy so far is good for a lightweight barrel, 1.5" at 100yds. I'm hoping accuracy will improve after barrel break in, but if it does not I will still be satisfie...
Read More...
Read All 6 Reviews
Color: Black Finish: QPQ Nitride Caliber: .308 Winchester Barrel Length: 18 inBarrel Profile: Light Weight Gas System Length: Rifle Length Gas Block Journal Size-Diameter: .750 inThreads per Inch: 5/8x24 Barrel Twist Rate: 1-10 Barrel Material: 416R Stainless Steel Flutes: No Weight: 2.23 ozGas Block Journal Size-Length: 1 in

Code: 2CU-ATB-2ALWBRL-2A-C308L18PB-1

MPN: 2A-C308L18PB-1

UPC: 854361006757

List: $386.67Save $30.93
$355.74

Product Info for 2A Armament Lightweight Barrel

2A Armament is proud to offer our own branded lightweight pencil barrel. These barrels are made in specialized factories and are the same barrels that ship with the BLR-16 rifle.image

Specifications for 2A Armament Lightweight Barrel:

Manufacturer: 2A Armament
Color: Black
Finish: QPQ Nitride
Fabric/Material: 416-R Stainless Steel
Caliber: .308 Winchester
Barrel Length: 18 in
Barrel Profile: Light Weight
Gas System Length: Rifle Length
Gas Block Journal Size-Diameter: .750 in
Threads per Inch: 5/8x24
Barrel Twist Rate: 1-10
Barrel Material: 416R Stainless Steel
Flutes: No
Weight: 2.23 oz
Gas Block Journal Size-Length: 1 in
Gas Port Size: 0.081 in

Features of 2A Armament Lightweight Barrel

  • 11 deg target crown
  • Magnetic Particle Inspected

Package Contents:

  • 2A Armament Lightweight Barrel

2A Armament Lightweight Barrel Orderable Models

List of Orderable Models

  • 2A Armament Lightweight Barrel, Black, 18in, 2A-C308L18PB-1 , MPN: 2A-C308L18PB-1 , UPC: 854361006757 , Code: 2CU-ATB-2ALWBRL-2A-C308L18PB-1

2A Armament Lightweight Barrel Unavailable & Discontinued Models

List of Unorderable Models

  • 2A Armament Lightweight Barrel, 5.56mm, 16in, Mid-Length, 1-8 Twist, 1/2x28 Thread, Black, 2A-C556L16PB-1 , MPN: 2A-C556L16PB-1 , UPC: 854361006740 , Code: 2CU-ATB-2ALWBRL-2A-C556L16PB-1
  • DEMO, 2A Armament Lightweight 6.5 Creedmoor Barrel, Black, 20, 2A-C65L20PB-1 , MPN: 2A-C65L20PB-1-DEMO , Code: 2CU-ATB-2ALWBRL-2A-C65L20PB-1-DEMO
  • 2A Armament Lightweight Barrel, 6.5 Creedmoor, 20in, Rifle-Length, 1-8 Twist, 5/8x24 Thread, Black, 2A-C65L20PB-1 , MPN: 2A-C65L20PB-1 , UPC: 854361006962 , Code: 2CU-ATB-2ALWBRL-2A-C65L20PB-1
Compare (0)