Description
The Andro Corp ACI-15 Halo takes everything people like about a short AR platform and does it without cutting corners. At the heart of it is a 10.3 inch 4150 CMV barrel with a Melonite QPQ treatment, a 1/7 twist that stabilizes everything from light varmint loads to heavy 77 grain match ammo, and M4 feed ramps for smooth feeding when you run it hard. The carbine-length gas system paired with a low-profile gas block keeps cycling soft and consistent, which matters a lot more on a short gun than most folks realize. Up front, the muzzle wears a classic A2 flash hider on 1/2-28 threads, so swapping to your preferred muzzle device takes about two minutes.
Forged Receivers and Real Build Quality on the ACI-15 Halo
Both the upper and lower are forged 7075-T6 aluminum, the same material spec you find on duty-grade rifles. The upper gets a dry film lube treatment with T-markings for repeatable optic and accessory mounting, while the lower carries a Type 3 hard coat anodized finish that shrugs off holster wear, range abuse, and weather. Inside, an M16-profile bolt carrier group and mil-spec lower parts kit keep things simple and easy to maintain with standard AR tools and parts. Andro Corp machines and assembles these in the USA and test-fires each one before it ships, and they back their firearms with a lifetime warranty.
Set Up the Halo AR Pistol Your Way
The 9 inch free-float M-LOK handguard gives you plenty of real estate for a light, sling mount, or hand stop, and the full-length Picatinny top rail handles optics and backup sights without any adapter fuss. The SB Tactical SBA3 adjustable brace rides on the rear, and a 30-round magazine comes in the box, so you are ready for the range the day you pick it up. At 5.6 pounds and just over 26 inches collapsed, it stores easily and moves fast in tight spaces, which is exactly what a gun like this should do.
Key Specifications
- Manufacturer: Andro Corp Industries
- Model: ACI-15 Halo
- MPN: 556103HB
- UPC: 796258933312
- Caliber: 5.56 NATO / .223 Rem
- Action: Semi-Auto
- Capacity: 30+1
- Barrel Length: 10.3"
- Barrel Material: 4150 CMV, Melonite QPQ finish
- Twist Rate: 1:7
- Muzzle Device: A2 flash hider, 1/2-28 threads
- Gas System: Carbine length, .750 low-profile gas block
- Handguard: 9" free-float M-LOK
- Receivers: Forged 7075-T6 aluminum, Type 3 hard coat anodized
- Brace: SB Tactical SBA3 adjustable
- Overall Length: 26 1/8" collapsed, 28 3/4" extended
- Weight: 5.6 lbs
What’s Included
- Andro Corp ACI-15 Halo 5.56 NATO AR pistol
- SB Tactical SBA3 adjustable pistol brace (installed)
- One 30-round magazine
Frequently Asked Questions
What ammo does the ACI-15 Halo shoot best with its 1/7 twist barrel?
The 1/7 twist rate is on the faster side, which means it stabilizes heavier bullets really well. Loads in the 62 to 77 grain range tend to shine, though standard 55 grain ball runs fine for range days. Out of a 10.3 inch barrel, heavier bullets also tend to hold their performance better at distance.
Can I swap the A2 flash hider on the Halo for a different muzzle device?
Yes. The barrel has standard 1/2-28 threads, so the A2 flash hider comes off easily and just about any 5.56 muzzle brake, comp, or suppressor mount will thread right on. It is one of the easiest upgrades you can make on this platform.
Does the Andro Corp ACI-15 Halo take standard AR-15 magazines?
It does. This is a mil-spec pattern lower, so PMAGs, aluminum GI mags, and pretty much any quality AR-15 magazine will lock in without issue. A 30-round magazine is included in the box to get you started.
Is the SBA3 brace adjustable?
Yes, the SB Tactical SBA3 is a five-position adjustable brace mounted on a mil-spec carbine buffer tube. That lets you dial in length of pull for your build, and it also means the rear end accepts a wide range of aftermarket accessories if you ever want to change things up.


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