BRO SSP-300BLK-MB 300B SPEC+SSP 16 MID BRNZ
$1,584.64
The BRO SSP-300BLK-MB 300B SPEC+SSP 16 MID BRNZ is a ready-to-shoot .300 Blackout AR-15 with a Nickel Boron BCG, adjustable gas block, and Magpul furniture. Built by Black Rain Ordnance, it delivers reliable performance for target shooting, hunting, or home defense.
The BRO SSP-300BLK-MB 300B SPEC+SSP 16 MID BRNZ is a purpose-built AR-15 chambered in .300 Blackout, designed for shooters who want a reliable, accurate platform right out of the box. With a 16-inch mid-length barrel, adjustable gas block, and a Nickel Boron coated bolt carrier group, this rifle is ready for suppressed and unsuppressed shooting. Built by Black Rain Ordnance, it combines premium components with a proven direct impingement system to deliver consistent performance at the range or in the field.
| Manufacturer | Black Rain Ordnance |
|---|---|
| Model | SPEC+ SSP-300BLK-MB |
| Material | 4150V Chromoly barrel, 7075-T6 aluminum receiver set (per manufacturer specs) |
| Compatibility | AR-15 lower receivers, .300 Blackout ammunition |
| Finish | Hardcoat anodized bronze finish on receiver set, Nitride-treated barrel |
| Weight | Approximately 7.2 lbs (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- Adjustable Gas Block – Why it matters: A .750 low-profile adjustable gas block lets you tune the rifle for different loads or suppressors, reducing recoil and improving reliability. This is especially helpful when switching between supersonic and subsonic ammunition.
- Nickel Boron Coated BCG – Why it matters: The slick, corrosion-resistant coating makes cleaning easier and reduces friction for smoother cycling. It’s a durable upgrade that keeps your rifle running longer between maintenance sessions.
- 15-Inch MLOK Slim Handguard – Why it matters: The free-floating design improves accuracy by preventing barrel contact, and the MLOK slots give you plenty of mounting options for lights, grips, or bipods. The slim profile fits smaller hands comfortably.
- Magpul MOE Grip and SL Stock – Why it matters: Both components offer a secure, ergonomic hold with storage compartments. The SL stock is lightweight and adjustable, making it easy to fit shooters of different sizes, including younger family members.
- Spec 15 Forged Charge Handle with Oversized Tac-Latch – Why it matters: The larger latch gives you a positive grip for quick, reliable charging, even with gloves or when using optics. It’s a simple upgrade that speeds up reloads and malfunction clears.
Who It’s For
This rifle is ideal for families and beginner shooters who want a versatile .300 Blackout platform for home defense, target shooting, or hunting. The adjustable gas system makes it forgiving for new shooters learning to manage recoil, while the quality components give experienced shooters confidence. It’s also a great choice for anyone looking to suppress their rifle later, thanks to the adjustable gas block and mid-length gas system.
Pros and Cons
- Pro: Ready out of the box with high-end upgrades like the Nickel Boron BCG and adjustable gas block.
- Pro: Bronze finish and slim handguard give it a unique look without sacrificing function.
- Con: The direct impingement system can be dirtier than piston-driven alternatives, but it’s simpler to maintain and lighter overall.
Comparison
| Feature | Black Rain Ordnance SSP-300BLK-MB | Geissele Super Duty 300 BLK | Zev Technologies Core Elite 300 BLK |
|---|---|---|---|
| Barrel Material | 4150V Chromoly | 4150 Chrome Moly Vanadium | 416R Stainless Steel |
| Gas System | Mid-length, adjustable | Mid-length | Pistol-length |
| Handguard | 15″ MLOK slim | 15″ MLOK | 15″ MLOK |
| BCG Finish | Nickel Boron | Black Nitride | Nickel Boron |
| Stock | Magpul MOE SL | Geissele Super 42 | Magpul CTR |
| Weight | ~7.2 lbs | ~7.5 lbs | ~7.0 lbs |
| Price | $1,414.86 | $1,899.00 | $1,999.00 |
The Black Rain Ordnance offers a better value with its adjustable gas block and Nickel Boron BCG at a lower price than the Geissele or Zev models. The mid-length gas system provides a softer recoil impulse compared to the pistol-length on the Zev, making it more comfortable for new shooters.
FAQ
Is this rifle compatible with standard AR-15 lower receivers?
Yes, the SSP-300BLK-MB uses a standard AR-15 lower receiver. You can pair it with any mil-spec or compatible lower. The upper is built to work with .300 Blackout magazines (standard AR-15 magazines work fine).
What kind of accuracy can I expect with this barrel?
According to Black Rain Ordnance specs, the 4150V Chromoly barrel is button-rifled and tested for sub-MOA accuracy with match ammunition. Expect 1-2 MOA with quality factory loads, which is more than enough for hunting or home defense.
Does the adjustable gas block require special tools to adjust?
No, the .750 low-profile adjustable gas block uses a standard Allen wrench (usually 3/32″) to adjust the gas flow. It’s simple to set for suppressed or unsuppressed use.
Can I use this rifle for hunting deer or hogs?
Absolutely. .300 Blackout with a 110-125 grain supersonic load is effective for deer and hogs at ranges under 200 yards. The 16-inch barrel gives you enough velocity for ethical shots, and the adjustable gas block helps manage recoil.
What is the warranty on this rifle?
Black Rain Ordnance offers a limited lifetime warranty on the receiver set and a one-year warranty on other components. Check their website for full terms.
Ready to Buy?
Add the BRO SSP-300BLK-MB 300B SPEC+SSP 16 MID BRNZ to your cart and get a dependable .300 Blackout rifle that’s built to perform for your whole family. It ships fast, backed by a 30-day return policy.
✔ Nationwide delivery (all 50 states)
✔ Ships 1-2 business days
✔ 30-day returns
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Last updated: April 2026
FFL Transfer & Firearms Laws for BRO SSP-300BLK-MB 300B SPEC+SSP 16 MID BRNZ
All firearms, including the BRO SSP-300BLK-MB 300B SPEC+SSP 16 MID BRNZ, must be shipped to a licensed Federal Firearms License (FFL) dealer. You will be required to complete a background check and any necessary paperwork before taking possession.
How It Works
- Place your order online.
- Provide your preferred FFL dealer information.
- We ship the firearm directly to your FFL.
- You complete the background check and pickup at the FFL.
Legal Compliance
We comply with all federal and state firearm laws. It is your responsibility to ensure the BRO SSP-300BLK-MB 300B SPEC+SSP 16 MID BRNZ is legal in your state. Some states may have restrictions on certain firearm models or features.
Helpful Resources
Need assistance? Contact our Miami store for help with FFL transfers and firearm compliance.
Frequently Asked Questions About This Product
Why buy BRO SSP-300BLK-MB 300B SPEC+SSP 16 MID BRNZ from Miami Shooters Supply?
We’re a trusted firearms dealer offering fast shipping, competitive pricing, and 100% compliance with U.S. federal firearm laws. All orders ship from our licensed facility with full tracking and expert customer service.
Where can I buy BRO SSP-300BLK-MB 300B SPEC+SSP 16 MID BRNZ?
You can purchase this item directly on our website and have it shipped to your local FFL dealer. You can also visit us in-store in Miami, Florida.
Is BRO SSP-300BLK-MB 300B SPEC+SSP 16 MID BRNZ available now?
Availability is shown live on this page. If the “Add to Cart” button is visible, this item is currently in stock and ready to ship.
What category does this product belong to?
This product is listed under: AR Rifles.
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It is your responsibility to ensure this item is legal in your state or locality. We ship only to valid FFL dealers in compliance with U.S. laws. Always check your local regulations.
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FFL Transfer & Firearms Laws
All firearms, including the BRO SSP-300BLK-MB 300B SPEC+SSP 16 MID BRNZ, must be shipped to a licensed Federal Firearms License (FFL) dealer. A background check and any required local paperwork must be completed before you can take possession.
How It Works
- Place your order online.
- Send us your preferred local FFL dealer info.
- We ship the firearm to your FFL after verification.
- Complete background check and pick up from your dealer.
Legal Compliance
We comply with all U.S. firearm laws. It is your responsibility to ensure the BRO SSP-300BLK-MB 300B SPEC+SSP 16 MID BRNZ is legal in your state. Some states (e.g. CA, NY, NJ) have restrictions on magazine size or certain features.
Helpful Links
Need help? Contact our team — we’ll guide you through selecting a compliant firearm and the FFL transfer process.
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