San Tan STT-15 Lite 6mm ARC 18″ AR Rifle, Black
$2,918.16
The San Tan STT-15 Lite 6mm ARC 18″ AR Rifle, Black combines a lightweight carbon fiber barrel with the flat-shooting 6mm ARC cartridge, making it ideal for family range days, varmint hunting, and precision steel shooting without heavy recoil.
The San Tan STT-15 Lite 6mm ARC 18″ AR Rifle, Black is a lightweight precision platform built for shooters who want to reach out with confidence without lugging a heavy gun all day. Chambered in the flat-shooting 6mm ARC, this rifle pairs an 18″ carbon fiber barrel with a reliable semi-auto action, making it a natural fit for varmint hunting, steel ringing, or family range days where accuracy matters.
| Manufacturer | San Tan Tactical |
|---|---|
| Model | STT-15 Lite 6ARC |
| Barrel Material | Carbon fiber wrapped (per manufacturer specs) |
| Caliber | 6mm ARC |
| Finish | Anodized black |
| Weight | Approximately 6.2 lbs (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- Carbon fiber barrel — WHY IT MATTERS: Saves nearly a full pound over a steel barrel of the same length, so new shooters and younger family members can hold steady longer without fatigue.
- 6mm ARC chamber — WHY IT MATTERS: This cartridge shoots flatter than .223/5.56 past 500 yards, giving beginners more hits on steel and less wind drift to worry about.
- Magpul CTR stock — WHY IT MATTERS: Provides a snug, wobble-free cheek weld with a friction lock, so the gun stays consistent shot after shot — great for teaching proper cheek placement.
- Magpul MOE Plus grip — WHY IT MATTERS: The rubber overmold gives a positive hold even with sweaty hands, reducing the chance of grip shifts during a string of fire.
- Flip-up front and rear sights — WHY IT MATTERS: Lets you start shooting right out of the box without buying extra gear, and they fold flat when you add an optic.
Who It’s For
This rifle is built for families who want to step up from .223 without jumping to a heavy recoiling .308. It’s ideal for youth shooters on the move, dads and moms teaching precision fundamentals, and anyone who wants a lightweight AR that can reach coyotes or steel at 600+ yards. If you’re new to 6mm ARC, the mild recoil and excellent ballistics make it a confidence builder.
Pros & Cons
Pros: Lightweight carbon fiber barrel reduces fatigue; 6mm ARC offers excellent long-range performance in a compact package; Magpul furniture is durable and beginner-friendly; anodized finish resists wear from field use.
Cons: The carbon fiber barrel may heat up faster during rapid strings than a heavy steel barrel — plan for cool-down breaks if you’re running drills.
Comparison
| Feature | San Tan STT-15 Lite 6mm ARC | Geissele Super Duty 16″ 5.56 | Zev Technologies OZ9C |
|---|---|---|---|
| Caliber | 6mm ARC | 5.56 NATO | 9mm |
| Barrel Length | 18″ carbon fiber | 16″ chrome-lined | 4.5″ barrel (pistol) |
| Weight | ~6.2 lbs | ~7.1 lbs | ~1.8 lbs |
| Best Use | Long-range varmint/steel | Duty/defense | Concealed carry |
| Price | $2,605.50 | ~$1,800 | ~$1,200 |
The San Tan STT-15 Lite stands out for its longer reach and lighter weight compared to the Geissele, while the Zev is a completely different class of firearm for handgun shooters.
FAQ
Will this rifle shoot standard .223/5.56 magazines?
No — the 6mm ARC uses its own specific magazines. San Tan recommends using 6mm ARC-specific or modified 6.5 Grendel magazines for reliable feeding.
Is the 6mm ARC good for deer hunting?
Yes, with proper expanding bullets. The 6mm ARC delivers enough energy for whitetail-sized game at reasonable distances, and the mild recoil makes it a great choice for youth hunters.
Can I mount a suppressor on this barrel?
Yes, the 18″ barrel is threaded 5/8-24, compatible with most .30-caliber suppressors. Just check your local laws and ensure the suppressor is rated for 6mm projectiles.
How accurate is this rifle out of the box?
Per San Tan Tactical specs, the STT-15 Lite is built to hold sub-MOA groups with match ammunition. Expect consistent 0.75–1.0 MOA with quality factory loads like Hornady Black.
Does it come with a case or cleaning kit?
No — the rifle ships with one magazine, flip-up sights, and the Magpul stock and grip. You’ll need to supply a case, optic (if desired), and cleaning gear separately.
✔ Trust & Delivery
- ✓ Nationwide delivery — all 50 states
- ✓ Ships 1–2 business days
- ✓ 30-day returns on new, unfired firearms
- ✓ Secure checkout with encrypted payment
Browse more options in our AR Rifles or 6mm ARC categories. Need a complete setup? Check our AR Accessories for optics, mags, and slings.
Last updated: April 2026
FFL Transfer & Firearms Laws for San Tan STT-15 Lite 6mm ARC 18″ AR Rifle, Black
All firearms, including the San Tan STT-15 Lite 6mm ARC 18″ AR Rifle, Black, must be shipped to a licensed Federal Firearms License (FFL) dealer. You will be required to complete a background check and any necessary paperwork before taking possession.
How It Works
- Place your order online.
- Provide your preferred FFL dealer information.
- We ship the firearm directly to your FFL.
- You complete the background check and pickup at the FFL.
Legal Compliance
We comply with all federal and state firearm laws. It is your responsibility to ensure the San Tan STT-15 Lite 6mm ARC 18″ AR Rifle, Black is legal in your state. Some states may have restrictions on certain firearm models or features.
Helpful Resources
Need assistance? Contact our Miami store for help with FFL transfers and firearm compliance.
Frequently Asked Questions About This Product
Why buy San Tan STT-15 Lite 6mm ARC 18″ AR Rifle, Black from Miami Shooters Supply?
We’re a trusted firearms dealer offering fast shipping, competitive pricing, and 100% compliance with U.S. federal firearm laws. All orders ship from our licensed facility with full tracking and expert customer service.
Where can I buy San Tan STT-15 Lite 6mm ARC 18″ AR Rifle, Black?
You can purchase this item directly on our website and have it shipped to your local FFL dealer. You can also visit us in-store in Miami, Florida.
Is San Tan STT-15 Lite 6mm ARC 18″ AR Rifle, Black available now?
Availability is shown live on this page. If the “Add to Cart” button is visible, this item is currently in stock and ready to ship.
What category does this product belong to?
This product is listed under: AR Rifles.
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Is this product legal in my state?
It is your responsibility to ensure this item is legal in your state or locality. We ship only to valid FFL dealers in compliance with U.S. laws. Always check your local regulations.
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FFL Transfer & Firearms Laws
All firearms, including the San Tan STT-15 Lite 6mm ARC 18″ AR Rifle, Black, must be shipped to a licensed Federal Firearms License (FFL) dealer. A background check and any required local paperwork must be completed before you can take possession.
How It Works
- Place your order online.
- Send us your preferred local FFL dealer info.
- We ship the firearm to your FFL after verification.
- Complete background check and pick up from your dealer.
Legal Compliance
We comply with all U.S. firearm laws. It is your responsibility to ensure the San Tan STT-15 Lite 6mm ARC 18″ AR Rifle, Black is legal in your state. Some states (e.g. CA, NY, NJ) have restrictions on magazine size or certain features.
Helpful Links
Need help? Contact our team — we’ll guide you through selecting a compliant firearm and the FFL transfer process.
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