Description
Picture this: you want the versatility of a modern AR platform but need a cartridge that bridges the gap between the 5.56 and heavier 7.62 rounds—without breaking the bank. You need a rifle that’s ready for the range, the field, or home defense right out of the box. That’s the practical niche the Windham Weaponry Model 300 Blackout .300 AAC Blackout 16″ Medium Profile Barrel Diamondhead T Brake 6-Position Telescoping Buttstock Black 30rd fills. It’s a complete, factory-built AR-15 pattern rifle chambered in the popular .300 AAC Blackout cartridge, designed for straightforward performance without a custom build’s cost and complexity.
Here’s the thing—for just $1210.24, you get a turn-key rifle from a manufacturer with a sterling reputation for quality. Windham Weaponry was founded by the original Bushmaster team, so you’re getting heritage and proven design without the premium boutique price tag. This rifle ships to Missouri and compliant US states, ready for your FFL to receive. The total package weight comes in at a manageable 7.5 lbs unloaded, striking a balance between stability and handling.
Key Features & Practical Value
The heart of this build is the 16-inch medium-profile barrel chambered in .300 AAC Blackout. This caliber is the real star, offering significantly more downrange energy than a 5.56 NATO from a similar-sized platform, especially with heavier subsonic loads. The medium contour barrel provides better heat management for range sessions than a pencil barrel, without the front-heavy feel of a full bull barrel. It’s a smart, value-focused tradeoff.
Up front, the included Diamondhead T-Brake muzzle device does double duty. It helps manage recoil and muzzle rise, making follow-up shots quicker, and its aggressive styling adds a distinct look. The rifle uses a standard carbine-length gas system, which is proven and reliable with a wide range of .300 BLK ammunition. Best of all, it’s drop-in ready and built to mil-spec dimensions where it counts. This means a huge universe of standard AR-15 parts and accessories will fit if you ever want to customize. Think Magpul grips, B5 Systems stocks, or any optic that mounts on a Picatinny rail.
The 6-position telescoping buttstock offers a full range of length-of-pull adjustments to fit shooters of all sizes, whether you’re wearing a t-shirt or winter gear. It comes paired with a standard A2 pistol grip. The rifle includes one 30-round magazine, giving you solid capacity right from the start. The upper features a Picatinny rail for optics and accessories, completing a ready-to-roll package. With an overall length of 34.5 inches with the stock collapsed, it remains maneuverable.
| Specification | Detail |
|---|---|
| Caliber | .300 AAC Blackout |
| Barrel | 16″ Medium Profile |
| Muzzle Device | Diamondhead T-Brake |
| Stock | 6-Position Telescoping |
| Magazine Capacity | 30 Rounds (1 included) |
| Overall Length | 34.5″ – 37.75″ (Collapsed – Extended) |
Pros, Cons, and Who It’s For
The Upside: You get a complete, functional rifle from a respected maker at a price point often reserved for bare-bones builds. The .300 BLK chambering is immensely versatile, effective for hunting medium game within 200 yards, and superb for suppressed shooting. The build uses reliable, mil-spec components, ensuring broad compatibility. It’s a true out-of-the-box solution.
The Tradeoffs: .300 BLK ammunition is more expensive than 5.56, so your range time costs more per round. The medium-profile barrel is a bit heavier than some might prefer for a strictly lightweight build. The included furniture is functional but basic—upgrading the grip or stock is an easy first project if you choose.
So who is this rifle for? It’s perfect for the budget-conscious shooter who wants to step into the .300 Blackout world without sourcing parts and assembling a rifle themselves. It’s an excellent choice for Missouri hunters seeking a capable, semi-automatic platform for whitetail or hog. It’s also a solid home defense option where over-penetration concerns with 5.56 might exist, especially with proper ammunition selection.
Frequently Asked Questions
Q: Will this rifle cycle both supersonic and subsonic .300 Blackout ammunition?
A: Yes, the carbine-length gas system and standard buffer are designed to reliably cycle the full spectrum of .300 BLK loads, from light supersonic rounds to heavy subsonics. For optimal performance with very low-pressure subsonics, a suppressor is often recommended.
Q: Is this rifle compatible with my existing AR-15 magazines and parts?
A: Absolutely. It uses standard .300 Blackout/5.56 NATO PMAGs or USGI magazines. The lower receiver is mil-spec, meaning triggers, grips, stocks, and safety selectors designed for the AR-15 platform will be compatible. The upper receiver uses a standard Picatinny rail.
Q: What’s the real-world advantage of .300 Blackout over a standard 5.56 AR?
A: The primary advantages are greater energy transfer on target (especially with heavier bullets) and far superior performance when suppressed with subsonic ammunition. From a 16″ barrel, .300 BLK loses less velocity compared to a shorter barrel than 5.56 does, making it more flexible.
Ready to add this versatile, value-packed AR to your collection? This Windham Weaponry Model 300 Blackout is available at firearms-missouri.com for Missouri residents and nationwide. Contact your local FFL to discuss the transfer process.
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