What is the best barrel length for an AR-15?

For general-purpose builds, 16 inches is the most versatile. Shorter barrels (10.5"–14.5") are ideal for CQB or suppressed setups, while longer barrels (18"–20") offer better velocity for long-range shooting.

What’s the difference between .223 Wylde and 5.56 NATO?

.223 Wylde is a hybrid chamber that allows you to shoot both .223 Rem and 5.56 NATO with greater accuracy than a standard 5.56 chamber.

Which twist rate should I choose?

1:7 is best for heavier 62+ grain bullets. 1:8 is a good all-around option, and 1:9 works well for 55 grain or lighter projectiles.

Do AR-15 barrels come with a gas block or gas tube?

Most barrels are sold separately and do not include a gas block or tube unless specified in the product listing.

AR-15 Barrels – 5.56, 300 BLK, Precision & Lightweight

**Spike's Barrel 5.56 16 Fn Chf W/m4 Ext** $314.96

**Spike's Barrel 5.56 11.5 Fn Chf M4 Ext** $324.36

**Spike's Barrel 5.56 14.5 Fn Mid Chf** $314.96

**Sons Of Liberty Gun Works V2 Barrel 5.56nato 10.5 Carb Blk** $282.60

**Sons Of Liberty Gun Works V2 Barrel 5.56nato 12.5 Car Blk** $284.05

**Noveske Barrel 5.56 14.5" Light Afgh"** $560.68

**Ballistic Barrel 5.56 13.9" Hnsn W/lpgb** $223.25

**Noveske Barrel 5.56 11.5" Sts"** $382.11

**Ballistic Barrel 5.56 13.9" Mid Gov 1/7** $161.50

**Ballistic Barrel 5.56 13.7" Mid Gov 1/7** $161.50

**Ballistic Barrel 5.56 12.3" Hanson Lpgb** $209.00

**Ballistic Barrel 5.56 11.3" Hanson Lpgb** $209.00

**Ballistic Barrel 5.56 18" Spr Ops12 Pro** $175.75

**Ballistic Barrel 5.56 16" Hanson W/lpgb** $232.75

**Ballistic Barrel 5.56 12.5" Car Gov 1/7** $152.00

**Ballistic Barrel 5.56 16" Classic Srs** $175.75

**Ballistic Barrel 5.56 16" Mid Gov 1/7** $166.25

**Ballistic Barrel 5.56 14.5" Mid Gov 1/7** $161.50

**Ballistic Barrel 5.56 10.5" Car Gov 1/7** $142.50

**Ballistic Barrel 5.56 10.3" Hanson Lpgb** $204.25

**Seekins Barrel 18 223wylde Blk** $395.00

**Seekins Barrel 10.5 300blk Blk** $395.00

**Seekins Barrel 16 223wylde Blk** $395.00

AR-15 Barrels – Precision-Crafted for Every Rifle Build

Whether you’re assembling your first rifle or upgrading a trusted platform, choosing the right AR-15 barrel is essential to achieving accuracy, reliability, and performance. At Mounts Plus, we offer a curated selection of premium AR-15 barrels from trusted manufacturers like Sons of Liberty Gun Works, Spike’s Tactical, and Faxon Firearms.

From 10.5” tactical setups to 18” precision builds, we stock barrels in a variety of lengths, calibers, profiles, and finishes — all designed to meet the demands of serious shooters.

🔩 Explore Our AR-15 Barrel Categories

🧱 5.56 NATO & .223 Wylde Barrels

Ideal for general-purpose and defensive builds
Available in 10.5", 14.5", 16", and 18" lengths
Mid-length, carbine, and rifle-length gas systems

🛠 300 Blackout Barrels

Perfect for suppressed or short-barrel setups
7.5” to 10.5” options with pistol-length gas
Match with subsonic or supersonic loads

⚙️ Heavy, Lightweight & Pencil Profiles

Heavy barrels for increased heat resistance & accuracy
Lightweight/pencil barrels for reduced weight and faster transitions
Government profile for balance between durability & mobility

🔬 Stainless Steel & Chrome-Lined Options

Stainless steel for match-grade accuracy
Chrome-lined & phosphate barrels for combat durability
Nitride finish options for corrosion resistance

🔧 Barrel Features & Specs You’ll Find

Twist rates: 1:7, 1:8, 1:9 – tailored to bullet weights
M4 feed ramps for reliable feeding
Threaded muzzles for suppressor or brake compatibility
Chambered in 5.56 NATO, .223 Wylde, and 300 BLK
Gas journal sizes: .750”, .625”, .936”
QPQ/nitride coatings, phosphate, stainless steel finishes

🔫 Compatible With:

Mil-spec AR-15 upper receivers
Free-float or drop-in handguards
Direct impingement systems (DI)
Most major manufacturers' gas blocks & muzzle devices

🙋 AR-15 Barrel FAQs

Q: What’s the best barrel length for an AR-15?
It depends on your purpose. 16” barrels are a great all-purpose length. 10.5” or 11.5” is better for CQB/SBR builds, while 18”+ provides better velocity for long-range shooting.

Q: What’s the difference between 5.56 NATO and .223 Wylde?
5.56 NATO chambers handle higher pressure. .223 Wylde allows you to safely shoot both 5.56 and .223 with improved accuracy from .223 loads.

Q: What’s a good twist rate for an AR-15 barrel?
1:7 is best for 62+ grain bullets. 1:8 offers flexibility. 1:9 is best for 55 grain or lighter projectiles.

Q: Do you offer AR barrels with pinned gas blocks?
Some of our barrels include pinned or dimpled gas block options. See individual product listings for details.

🛒 Why Buy AR-15 Barrels from Mounts Plus?

✅ Premium selection of proven barrel manufacturers
🛠 Expert-curated options for precision, tactical, or budget builds
🚚 Fast, reliable U.S. shipping
🔁 Easy returns & real shooter support
🔧 Over 30 years supporting the firearm community

👉 Shop AR-15 Barrels Now
Whether you're building a rifle for home defense, competition, hunting, or range fun — Mounts Plus has the AR-15 barrel to complete your upper with confidence.

AR-15 Barrels – 5.56, 300 BLK, Precision & Lightweight | MSP