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Stag Arms 18" 5.56 NATO SPR Fluted Stainless Steel Rifle Length AR-15 Barrel Premium Series 1:8 Twist

Stag Arms · Barrels

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Stag Arms 18" 5.56 NATO SPR Fluted Stainless Steel Rifle Length AR-15 Barrel Premium Series 1:8 Twist

Best price

$243.00at AR15Discounts

checked Nov 13, 2026

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Fits and works with

Caliber
5.56 / .223 · Shop matching ammo
Bolt
Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Gas system
Rifle · Handguards
Barrel length
18" · Handguards

Specifications

Manufacturer
Stag Arms
Platform
AR-15
Caliber
5.56 mm NATO
Gas system
Rifle
Barrel length
18"
Twist rate
1:8

Where to buy

StorePriceAvailabilityBuyAdd to build
AR15Discounts Best price 5% off $243.00checked Nov 13, 2026 Check store Buy at AR15Discounts
Dirty Bird $243.00checked Nov 13, 2026 Check store Buy at Dirty Bird

Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.

Price history

Dashed line = out of stock. Tracking since Oct 28, 2026.

Show the prices as a table
StoreLatestLowestHighest
AR15Discounts$243.00$243.00$243.00
Dirty Bird$243.00$243.00$243.00

Since Oct 28, 2026.

About this part

The Stag Arms 18" 5.56 NATO SPR Fluted Stainless Steel Rifle Length AR-15 Barrel Premium Series 1:8 Twist is an 18" 5.56 / .223 barrel from Stag Arms with a rifle gas system. It's sold by 2 stores, all at $243.00.

From the manufacturer

Elevate your AR-15 performance with the Stag Arms 18" 5.56 NATO SPR Fluted Stainless Steel Rifle Length Barrel from the Premium Series. Designed for discerning shooters who demand precision and reliability, this 1:8 twist barrel delivers exceptional accuracy and balance, making it ideal for long-range target shooting, varmint hunting, or tactical applications. Crafted from premium 416R stainless steel, it ensures consistent shot groups while the strategic fluting reduces weight for enhanced maneuverability without compromising structural integrity. Key Features Fluted SPR Profile: The Special Purpose Rifle contour with fluting dissipates heat faster and shaves ounces off the overall build weight, allowing for quicker handling and reduced fatigue during extended sessions at the range or in the field. Premium 416R Stainless Steel: Offers superior corrosion resistance and maintains tight tolerances for reliable performance in adverse conditions, ensuring your barrel stands up to rigorous use and environmental exposure. Rifle-Length Gas System: Delivers smoother operation, minimized recoil impulse, and improved control, enabling faster follow-up shots and greater shooter comfort. 1:8 Twist Rate: Stabilizes a broad spectrum of bullet weights from 55 to 77 grains, supporting diverse applications from plinking to precision varmint control with sub-MOA potential. Technical Specifications Barrel Length: 18 inches Material: 416R Stainless Steel Finish: Bead Blasted Profile: SPR (Special Purpose Rifle) Fluted Gas System: Rifle Length Gas Block Journal: 0.750 inches Twist Rate: 1:8 Muzzle Threads: 1/2"-28 Weight: 32.02 oz Platform: AR-15 Why Choose the Stag Arms Premium Series Barrel? For AR-15 enthusiasts frustrated with heavy, unbalanced setups or inconsistent accuracy from stock barrels, this fluted stainless option solves those issues head-on. The lightweight design enhances portability and speed, while the robust construction and precise rifling deliver dependable groups round after round. Drop-in ready for most AR platforms, it integrates seamlessly into custom builds or upgrades, backed by Stag Arms' commitment to quality. Overcome the limitations of standard barrels and unlock superior velocity, stability, and durability tailored for serious shooters. Transform your AR-15 into a precision instrument today. Add the Stag Arms 18" 5.56 NATO SPR Fluted Barrel to your build and experience the confidence that comes from premium engineering and unwavering performance.

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