Description
The 300 Blackout cartridge was built from the ground up for short barrels, and the Andro Corp ACI-15 Halo takes full advantage of that. Its 10 inch 4150 chrome moly vanadium barrel with a black nitride (QPQ Melonite) finish burns nearly all of the powder this round has to offer, so you get real performance out of a package that stays quick and easy to move with. The 1:7 twist stabilizes everything from light supersonic loads to heavy 220 grain subsonics, and the 5/8×24 threaded muzzle with A2 flash hider means adding a suppressor down the road is a simple swap. Owners running these guns suppressed with both subs and supers report smooth cycling right out of the box.
What Makes the ACI-15 Halo Run
Under the handguard you will find a pistol length gas system with a .750 low profile gas block, which is the right recipe for reliable cycling in a 10 inch 300 Blackout. The bolt carrier group is a full auto profile M16 style unit, and it feeds through M4 feed ramps for consistent chambering. Both the upper and lower receivers are forged 7075-T6 aluminum with a Type III hard coat anodized finish, and the upper includes T-markings, a forward assist, and a dust cover. A full length Picatinny rail up top handles optics, while the free floating M-LOK handguard keeps weight down and gives you plenty of real estate for lights, lasers, or a hand stop.
Andro Corp Halo 300 Blackout: Built for the Job
The SB Tactical SBA3 adjustable brace gives this pistol a stable, comfortable interface, and the mil-spec lower parts kit with A2 grip keeps everything familiar if you have spent any time behind an AR. At home it makes a maneuverable defensive option, in the truck it stows easily, and at the range it is just plain fun, especially suppressed. Andro Corp builds these in the USA and stands behind them with a lifetime warranty, which says a lot about the quality coming out of their shop. It ships with a 30 round magazine, so you are ready to go from day one.
Key Specifications
- Manufacturer: Andro Corp Industries
- Model: ACI-15 Halo
- MPN: 30010HB
- UPC: 796258933428
- Caliber: .300 AAC Blackout
- Action: Semi-Automatic
- Capacity: 30+1
- Barrel Length: 10"
- Barrel Material/Finish: 4150 CMV, Black Nitride (QPQ Melonite)
- Twist Rate: 1:7
- Muzzle Device: A2 Flash Hider, 5/8×24 Threads
- Gas System: Pistol Length w/ .750 Low Profile Gas Block
- Bolt Carrier Group: M16 Profile, Full Auto Rated
- Receivers: Forged 7075-T6 Aluminum, Type III Hard Coat Anodized
- Handguard: 9" M-LOK Free Float
- Brace: SB Tactical SBA3 Adjustable Pistol Brace
What’s Included
- Andro Corp ACI-15 Halo 300 Blackout pistol
- One 30 round magazine
- SB Tactical SBA3 pistol brace (installed)
Frequently Asked Questions
Will the ACI-15 Halo cycle subsonic 300 Blackout reliably?
Yes. The pistol length gas system paired with the 10 inch barrel is the proven setup for cycling both subsonic and supersonic 300 Blackout, and owners of these Andro Corp builds report running suppressed subs and supers with no issues right out of the box. The 1:7 twist barrel also stabilizes heavy 200 to 220 grain subsonic bullets properly.
Is the barrel on the Halo 300 Blackout suppressor ready?
It is. The muzzle is threaded 5/8×24, which is the standard thread pitch for .30 caliber suppressors and muzzle devices. Just remove the included A2 flash hider and thread on your can or a suppressor mount, and you are set.
Does the Andro Corp ACI-15 Halo take standard AR-15 magazines?
Yes, 300 Blackout uses the same case head and magazine dimensions as 5.56, so it feeds from standard AR-15 magazines. It ships with one 30 round magazine, and any quality mil-spec pattern mag will work. Just be careful to keep your 300 Blackout ammo clearly separated from any 5.56 mags.
Is the SBA3 brace adjustable?
The SB Tactical SBA3 rides on a carbine style buffer tube and offers multiple adjustment positions, so you can dial in length of pull to fit your build and shooting style. It also includes an integrated QD sling socket, which is a handy touch for running a single point or two point sling.




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