DoubleStar .300 Blackout 16″ HBAR Optic Ready Rifle

Description

Picture this: you need a rifle that transitions seamlessly from the range to the field, a tool that handles both supersonic loads for distance and heavy, quiet subsonics when discretion is paramount. That’s the role of the DoubleStar .300 Blackout, 16″ HBAR, Optic Ready, 30rd, Black. It’s a complete, ready-to-run AR-platform rifle chambered in the versatile .300 AAC Blackout cartridge. Built on a durable 16-inch heavy barrel profile, it comes optics-ready with a flat-top upper receiver and ships with a 30-round magazine. Priced at $786.39, it’s a turnkey solution for hunters, home defenders, and shooters who value adaptability.

When it comes to building a reliable, multi-role rifle, the foundation is everything. This DoubleStar starts with a 16-inch heavy barrel (HBAR) in .300 Blackout. The added mass of the HBAR contour isn’t just for looks—it manages heat during strings of fire and provides a steadier hold for more consistent shot placement. The rifle is drop-in ready for any standard mil-spec optic mount, allowing you to install your preferred red dot, prism scope, or LPVO without any gunsmithing. It’s designed to work with standard AR-15 lowers and magazines, meaning parts and compatibility headaches are a non-issue.

Let’s talk about the cartridge. The .300 Blackout was engineered to deliver .30-caliber performance from a standard AR-15 platform. With this 16-inch barrel, you unlock the round’s full potential. You can push 110-grain supersonic rounds for effective varmint or deer hunting out to a couple hundred yards. Then, with a simple magazine swap to loaded with 200+ grain subsonic ammunition and a attached suppressor, you have a profoundly quiet and capable system for close-quarters or pest control. The rifle’s mid-length gas system is tuned to cycle both types of ammunition reliably, a critical feature often overlooked in budget builds.

DoubleStar .300 Blackout Rifle Specifications

Specification	Detail
Caliber	.300 AAC Blackout
Barrel Length	16″ Heavy Barrel (HBAR)
Magazine Capacity	30 Rounds (1 included)
Receiver Finish	Hardcoat Black Anodized
Handguard	M-LOK Compatible
Stock	6-Position Adjustable

Pros: The primary advantage is versatility in a ready-to-shoot package. The optics-ready upper saves immediate cost and lets you choose your perfect sighting system. The HBAR barrel aids accuracy, and the use of common AR-15 parts simplifies maintenance. The .300 Blackout chambering itself is the biggest pro—offering two distinct performance envelopes from one rifle.

Cons: .300 Blackout ammunition is more expensive and less common than 5.56 NATO. The HBAR profile makes the rifle slightly heavier than a pencil-barrel counterpart, which could be a factor on long carries. It’s a complete rifle, so if you already have a lower you love, you might prefer an upper-only assembly.

So who is this for? This rifle is for the Missouri hunter seeking a compact, effective whitetail rifle that can also serve as a suppressed predator control tool. It’s for the prepared citizen who values a potent, short-range defensive cartridge that performs well with or without a suppressor. It’s also an excellent choice for the shooter who wants to step into the .300 Blackout world without the guesswork of building their first one—this one fits out of the box. This complete firearm is available at firearms-missouri.com for Missouri residents and nationwide, with an FFL transfer required for firearm purchases.

Frequently Asked Questions

Q: Will this rifle cycle subsonic ammunition without a suppressor?

A: Typically, yes. The mid-length gas system on this 16-inch barrel is generally over-gassed enough to cycle heavy subsonic loads even unsuppressed, though reliability can vary with specific ammunition brands. For optimal function with subs, especially lighter projectiles, a suppressor is recommended as it provides necessary backpressure.

Q: Can I use my existing 5.56 NATO magazines?

A: In most cases, yes. The .300 Blackout round is designed to work in standard AR-15 magazines. Many shooters successfully use Magpul PMAGs and USGI aluminum mags dedicated to .300 BLK to avoid the dangerous mix-up of loading a .300 BLK round into a 5.56 rifle.

Q: Is the handguard compatible with accessories?

A: Absolutely. The rifle features an M-LOK compatible handguard, allowing you to directly attach a wide array of accessories like foregrips, weapon lights, and rail sections from brands like Magpul, Streamlight, and Cloud Defensive without needing bulky rail adapters.

If a do-it-all .300 Blackout rifle that prioritizes durability and a clean optic setup aligns with your needs, consider adding the DoubleStar to your collection.