Daniel Defense AR-15 Barrel - 5.56 NATO - 18" - S2W Heavy Profile - Rifle-Length - 1:7 Twist
or 4 interest-free payments of $91.25 with 
6 Magazines Per Order: Due to extreme volume, we are limiting sales of magazines to 6 per customer order. This applies to individual and bundled magazines. AT3 reserves the right to cancel any order over the 6 magazine limit.
- Free standard shipping on orders $139+ details
- 90-day no-hassle returns policy
- Backed by the Daniel Defense Warranty! what it covers
Product description
Daniel Defense 18″ S2W 5.56 NATO Barrel – Rifle-Length Gas
Features
- 18″ 5.56 NATO barrel with Daniel Defense Strength-to-Weight (S2W) heavy profile
- Heavier S2W contour provides increased barrel mass compared with Daniel Defense Government and Lightweight profiles
- Cold hammer forged construction for consistent chamber and rifling geometry
- Rifle-length gas system pairs the 18″ barrel with a longer gas system for a precision-oriented AR-15 configuration
- 1:7 twist rate supports a broad range of common 5.56 NATO and .223 Rem ammunition
- Chrome-lined bore and chamber provide a durable internal surface for extended service life
- Mil-spec heavy phosphate exterior finish provides wear and corrosion resistance
- 1/2×28 muzzle threads accept compatible 5.56 AR-15 muzzle devices
The Daniel Defense 18″ S2W Barrel combines a heavier Strength-to-Weight profile with a rifle-length gas system for AR-15 builds that prioritize barrel rigidity and sustained performance over minimum front-end weight. Its cold hammer forged construction, chrome-lined bore and chamber, 1:7 twist, and heavy phosphate exterior follow Daniel Defense’s duty-oriented barrel design while the 18″ length provides additional barrel mass and velocity potential compared with shorter configurations.
Note: This is the standalone barrel configuration. Gas block, gas tube, barrel nut, and muzzle device are not included.
Specifications
- Brand: Daniel Defense
- Model: S2W Barrel
- MPN: 07-116-05042-018
- Caliber: 5.56 NATO / .223 Rem
- Barrel Length: 18″
- Profile: Strength-to-Weight (S2W) Heavy
- Twist Rate: 1:7
- Gas System: Rifle length
- Muzzle Thread: 1/2×28
- Bore / Chamber: Chrome lined
- Manufacturing Method: Cold hammer forged
- Finish: Mil-spec heavy phosphate
- Color: Black
What’s Included
- 1x Daniel Defense 18″ 5.56 NATO S2W Barrel
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Questions & Answers
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Warranty & returns
Backed by the Daniel Defense Warranty!
Daniel Defense Warranty
All Daniel Defense products carry a 100% satisfaction guarantee against defects in original materials and workmanship.
If your Daniel Defense product shows evidence of such defects, Daniel Defense will make every accommodation to fix, repair, or replace your product in the most expeditious manner possible.
Daniel Defense does not warranty products or damage caused to our products by the correct or incorrect installation of other manufacturer’s products.
Be sure to retain your sales slip as proof of purchase date when making a claim.
Requirements
- Please use the form below to contact our Warranty department to create an RMA prior to shipping items to ensure they are processed in a timely fashion.
- Merchandise must be in new condition with the original packaging.
- Merchandise must be return-shipped in a protective box.
- A full refund including shipping if the return resulted from our error.
- Otherwise, we will deduct the shipping costs from your refund.
- Refunds for items purchased directly from Daniel Defense will be returned to the original purchase method.
- Refunds for items purchased through our Financing Partner, Expert Voice, or other special programs, will be credited to those partners who will refund customers directly (processing times may vary).
- Any other refunds will be issued via Check delivered by USPS.
- Please provide a copy of the receipt or sales order number to expedite the process.
- The customer will receive a refund within 10 business days of our receiving your return.
Faulty Products
If the product has been used in accordance with the manufacturer’s instructions, but is faulty, unfit for purpose, or does not match the sample or description please return the product to us with a copy of your invoice. We may send the product to the manufacturer’s service agent for assessment. Where the product is determined faulty or unfit for purpose we will provide you with a refund or exchange.
Disclaimer: Manufacturer’s warranty is subject to change without prior notice.
90-day no-hassle returns
The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.
If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.