If you’re looking for a factory-built AR that’s ready to hunt or shoot steel at distance, the BILSON A3FSSTB20R1 BA15FC 6ARC 18 20R TGRY/GBLK is a solid pick. This semi-auto rifle from Bilson pairs an 18-inch barrel chambered in 6mm ARC with a 20-round magazine, a gray and black finish, and the kind of build quality that makes a new shooter feel confident and an old hand nod in approval. It’s a complete rifle, not a project — you can unbox it, mount an optic, and hit the range.
| Manufacturer | Bilson |
|---|---|
| Model | A3FSSTB20R1 BA15FC |
| Material | 7075-T6 aluminum upper and lower receiver, 4150 CMV barrel (per manufacturer specs) |
| Compatibility | 6mm ARC ammunition, standard AR-15 magazines |
| Finish | Type III hardcoat anodized — gray (TGRY) and black (GBLK) |
| Weight | 7.4 lbs (empty, per manufacturer specs) |
| Condition | New |
Key Features
- 18-inch 6mm ARC barrel — WHY IT MATTERS: The 6mm ARC cartridge delivers flat trajectories and retained energy past 600 yards, making this rifle a legit choice for varmint hunting or medium-range steel. The 18-inch length balances velocity and maneuverability.
- Rifle-length gas system — WHY IT MATTERS: A longer gas system reduces felt recoil and bolt carrier speed, which improves reliability and parts longevity. You’ll notice smoother cycling and less wear over time.
- Free-float M-Lok handguard — WHY IT MATTERS: Free-floating the barrel keeps pressure off the barrel for better accuracy potential. The M-Lok slots let you attach bipods, lights, or grips without adding bulk.
- Adjustable stock and grip — WHY IT MATTERS: You can fit the rifle to your body type or shooting position. A proper fit means better recoil control and faster target acquisition.
- Flat dark earth Cerakote accents — WHY IT MATTERS: The two-tone gray and black finish resists corrosion and scratches better than standard anodizing alone. It also looks sharp without being tacticool.
Who It’s For
This rifle is built for the hunter who wants a lightweight, flat-shooting platform for coyotes or hogs, and for the target shooter who values consistency from the bench. It’s also a great option for the new AR owner who wants a reliable, ready-to-go rifle chambered in a modern, capable cartridge. If you’re looking for a 6mm ARC that doesn’t need upgrades out of the box, this is it.
Pros & Cons
- Pro: Factory-assembled and tested — no guesswork, no fitting. Per Bilson specs, each rifle is function-fired before shipping.
- Pro: The 6mm ARC cartridge offers less recoil than .308 with similar ballistics to 500-600 yards, making it easier to spot your own hits.
- Pro: Uses standard AR-15 magazines (20-round included), so you can run cheap mags without hunting for proprietary ones.
- Con: 6mm ARC ammunition is not as widely available as 5.56 or .223 — you’ll want to stock up online or at dedicated shops. It’s also more expensive per round.
Comparison
| Feature | Bilson BA15FC 6ARC | Geissele Super Duty 6ARC | Zev Technologies OZ9C (9mm) |
|---|---|---|---|
| Caliber | 6mm ARC | 6mm ARC | 9mm |
| Barrel Length | 18 inches | 16 inches | 4.5 inches |
| Gas System | Rifle-length | Mid-length | N/A (pistol) |
| Weight | 7.4 lbs | 6.9 lbs | 1.8 lbs |
| Price | $1,762.05 | $2,450 | $1,799 |
| Best For | Hunting, target shooting | Duty, hard use | Concealed carry |
The Bilson offers a longer barrel for better velocity in 6mm ARC at a lower price point than the Geissele. The Zev is a pistol, so it’s a different tool entirely — the comparison shows that for a dedicated precision AR, the Bilson delivers more value per dollar.
FAQ
What magazines does the Bilson BA15FC use?
It uses standard AR-15/M16 magazines. The rifle ships with one 20-round magazine, but any quality 5.56/.223 magazine will work — just make sure it’s rated for 6mm ARC (most are).
Is the 6mm ARC good for hunting?
Yes. The 6mm ARC was designed for hunting varmints and medium game like coyotes, hogs, and deer. It offers less recoil than .308 and retains energy well past 400 yards. Always check your local regulations for caliber restrictions.
Can I mount a suppressor on this rifle?
The barrel is threaded 5/8×24, common for 6mm and .30-caliber suppressors. The rifle-length gas system helps reduce port pop when suppressed. You’ll need a direct-thread or QD mount compatible with that thread pitch.
Does the handguard have a top rail?
Yes, the free-float M-Lok handguard includes a full-length Picatinny top rail for mounting optics and backup iron sights. The rail is continuous with the upper receiver for a solid zero.
What’s the twist rate of the barrel?
Per Bilson specs, the 18-inch barrel has a 1:7.5 twist rate, optimized for heavier 6mm ARC bullets (105-108 grain) commonly used for long-range accuracy.
✅ Nationwide delivery (all 50 states)
✅ Ships 1-2 business days
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See more in our Semi Auto Rifles category, or check out AR-15 Uppers and 6mm ARC Ammunition.
Last updated: April 2026
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