FN SCAR 16 – 6mm ARC

Description

FN SCAR 16 6mm ARC Custom Barrel

Deadshot Barrels offers this custom FN SCAR 16 barrel chambered in 6mm ARC. This configuration is available in stainless steel (SS) with a 1:7.5 twist only, and barrel lengths from 10.5 through 16 inches. Choose your available muzzle, finish, and assembly options below.

Why 6mm ARC?

6mm ARC stands for 6mm Advanced Rifle Cartridge. It was developed for efficient 6mm bullet designs in compatible compact-action rifle platforms. Like any chambering, its actual performance depends on the ammunition and complete setup.

Why choose 6mm ARC for your SCAR 16?

For SCAR 16 owners interested in precision-oriented target shooting or sporting use, 6mm ARC offers a different balance than the familiar .223/5.56 chambering. It was developed around streamlined 6mm bullets that can retain speed and resist wind well downrange, while keeping recoil manageable. That can be appealing if you already like the SCAR 16 platform but want a cartridge aimed at different shooting priorities. Actual results depend on the load, barrel length, and conditions; it is not automatically the right choice for everyone.

What are the tradeoffs?

6mm ARC ammunition and some related components may be harder to find than common .223/5.56 options. Compare local ammunition availability and costs before choosing this chambering. Shorter barrels also change velocity and downrange performance, so don’t expect published ballistics from longer test barrels to apply to every length offered here.

6mm ARC, 6.5 Grendel, and 6mm Creedmoor are distinct cartridges, and their ammunition is not interchangeable. A factory SCAR 16 is not automatically compatible with 6mm ARC just because a custom barrel is available. The matching bolt and other required components must be confirmed for your specific rifle and chambering. Contact Deadshot Barrels before ordering if you are planning a caliber conversion.

Customize your FN SCAR 16 barrel

Here’s what you can choose for this barrel:

• Barrel steel and twist: Stainless steel (SS), 1:7.5 twist only. No other materials or twist rates are offered on this listing.
• Barrel length: 10.5 to 16 inches maximum. No lengths over 16 inches are available.
• Muzzle: Target crown, 5/8×24 threads, or 5/8×24 threads with Q/SIG taper where compatible.
• Fluting: Choose six-groove, spiral, diamond, or none for a smooth barrel. Some profiles limit fluting choices.
• Cerakote: Pick a finish color from the swatches shown on the page.
• Gas block and barrel extension: Choose new components or tell us which complete assembly you’re sending in. The guide below explains the difference.
• Conversion bolt: There’s also an optional caliber-conversion bolt selection. Ask us about the required components if you’re unsure.

Before You Order

• Check your rifle: This listing is for an FN SCAR 16 barrel chambered in 6mm ARC. Verify your rifle’s compatible components with Deadshot before ordering.
• Double-check your choices: The available barrel is stainless steel with 1:7.5 twist and a maximum length of 16 inches. Review your muzzle, fluting, and Cerakote selections. This is a custom-made order.
• Assembly option: Choose new components or tell us which complete existing assembly you’re sending in. See below.

Barrel Options Explained

Stainless steel (SS): SS is the only barrel material offered on this 6mm ARC listing. It offers corrosion resistance but still requires normal care.

Twist rate: The 1:7.5 rifling twist means one complete turn every 7.5 inches. It describes the rifling, not the overall barrel length.

Target crown or muzzle threads: A target crown is an unthreaded muzzle finish. The 5/8×24 choice has external threads.

Q / SIG taper (optional, no extra taper charge): Standard 5/8×24 muzzle threads typically have a flat, 90-degree shoulder behind them. The Q / SIG option uses those same threads with a 25-degree angled shoulder instead. Certain Q- and SIG-style muzzle devices and suppressor mounts are made to seat against this taper, giving the mount its intended contact surface. Why choose it? It is a fitment choice: select 5/8×24 Threads + Q/SIG Taper if your specific mount calls for a 25-degree taper, or choose standard 5/8×24 threads if it calls for a flat shoulder. The taper does not change the thread size or automatically improve accuracy. There is no extra taper charge beyond any existing threading cost. Check your mount specifications or ask Deadshot if you are unsure.

Fluting: Grooves along the outside of the barrel. Select None for a smooth barrel where offered.

Cerakote: A colored protective coating. Choose from the finishes shown above.

What Do the Gas Block and Barrel Extension Do?

Gas block: The gas block is part of the SCAR’s piston operating system. It directs a portion of the gas from a fired round into that system, while the gas regulator controls how the gas is managed.

Barrel extension: This is the steel component at the rear of the barrel where the bolt locks into place. It’s an important part of the completed barrel assembly, not just a mounting piece.

What’s Different About Deadshot’s Gas Block?

Traditional FN SCAR gas-block configurations can include a folding front sight. Our gas block has a cleaner, sleeker shape without that integrated sight, leaving you free to choose your own sight setup.

Our design retains SCAR-style adjustable gas regulation and is made for suppressed and unsuppressed use. We have tested our design with a variety of suppressors. If you have questions about a particular suppressor or handguard, reach out to us before ordering.

Gas Block and Barrel Extension: Which Option Do I Choose?

Choose the option that fits your order:

• Build with new components: We supply a new gas block and barrel extension. You don’t need to send us an assembly.
• Submit your Deadshot Barrels assembly: Send your existing Deadshot SCAR assembly intact so we can evaluate and reuse its components. No extra component charge for this option.
• Submit your FN barrel assembly: Send your original FN SCAR assembly intact so we can evaluate and reuse its components. The extra fee appears in the dropdown.

Sending an assembly? Include your invoice number and follow the shipping instructions in the acknowledgment on the order form. Leave the assembly intact.

There’s an optional caliber-conversion bolt choice. Contact us if you aren’t sure what your assembly needs.

What Happens After You Order?

1. We use the options you selected. If you need to correct anything, contact us as soon as possible.
2. Allow time for production. The current estimate is 3–8 weeks, not a guaranteed delivery date.
3. Need an update? Contact us with your order number.

Common Questions About This Barrel

Questions Before You Order?

Still comparing options? Our Barrel FAQs explain barrel materials, twist rates, common terminology, ordering and care.

Not sure about your SCAR 16 6mm ARC options? Email us about this barrel or use our Contact page.

Returns and warranty

All sales are final by default. Discretionary return requests are reviewed individually and require prior approval. If a discretionary return is approved, a 25% restocking fee applies. A 15% cancellation fee applies after work has started. We evaluate manufacturing-defect concerns under our warranty. Review our Refund Policy and Terms of Service for complete details.