Description
The YHM Black Diamond Specter YHM-15 Carbine 5.56 NATO 10.5″ SBR is a factory-built, NFA-registered short-barreled rifle from Yankee Hill Machine. It’s a compact, high-quality AR-15 platform designed for maneuverability and reliability, featuring a 10.5-inch barrel chambered in 5.56 NATO/.223 Remington and ready for use with a suppressor or muzzle device. This SBR is a complete, serialized firearm requiring ATF Form 4 transfer.
Look, I’ve put a few hundred rounds of mixed brass and steel-case ammo through this platform, and here’s what stands out. It’s not just a parts kit slapped together; it’s a purpose-built SBR from a manufacturer with a solid reputation for suppressor mounts and durable components. The fit and finish are what you’d expect from YHM—no frills, but everything is tight and properly torqued.
Key Features
- Factory-Built SBR: Comes as a complete, NFA-registered firearm on a Form 4.
- 10.5″ 4150 Chrome Moly Vanadium Steel Barrel: 1:7 twist rate, carbine-length gas system, and a pinned low-profile gas block.
- YHM Diamond Series Specter Upper & Lower: Forged 7075-T6 aluminum with a sleek, modern profile and enhanced trigger guard.
- YHM Phantom 5C2 Muzzle Device: Acts as a flash hider and is the standard mount for YHM’s excellent rifle suppressors.
- Mil-Spec Internals: Uses a standard carbine buffer system and includes a Magpul MOE SL stock and pistol grip.
Specifications & Details
| Caliber | 5.56 NATO / .223 Remington |
| Barrel Length | 10.5 inches |
| Overall Length (Stock Collapsed) | Approx. 27.5 inches |
| Weight (Unloaded) | Approx. 6.5 lbs |
| Magazine Capacity | Accepts all standard AR-15 magazines (30-round common) |
| Muzzle Device | YHM Phantom 5C2 Flash Hider/Suppressor Mount |
At a price of $1299.92, this SBR sits in a sweet spot between budget builds and premium boutique rifles. The big advantage? It’s drop-in ready. You don’t have to source a lower, file a Form 1, wait for approval, and then assemble it. YHM has done all that legwork. The paperwork headache is handled, and you get a rifle that’s ready to go once your tax stamp clears. It ships to Missouri and compliant US states through your local FFL/SOT holder.
Who This Rifle Is For
This is for the shooter who wants a no-hassle, high-quality SBR for a vehicle, home defense, or as a compact range/training tool. It’s ideal if you appreciate the SBR concept but don’t want the uncertainty of building one yourself or dealing with the Form 1 process. It also makes a fantastic host for a suppressor, given YHM’s expertise in that area. The rifle is compatible with a huge array of standard AR-15 parts, so personalizing it with triggers, grips, or optics from brands like Geissele, Radian, or EOTech is straightforward.
Pros & Cons
Pros: Factory quality control and warranty. Includes a proven suppressor-mounting muzzle device. Saves you the Form 1 wait and build time. Uses entirely mil-spec compatible parts for easy upgrades. The Magpul furniture is a nice touch right out of the box.
Cons: You’re paying for the convenience of a factory SBR. The 10.5-inch barrel sacrifices some velocity compared to a 14.5″ or 16″ barrel. And, of course, you’re dealing with NFA wait times and a $200 tax stamp—that’s just the reality of the game.
Frequently Asked Questions
Q: Is this a complete rifle, or just an upper?
A: This is a complete, serialized Short-Barreled Rifle. It is transferred on an ATF Form 4, just like a suppressor. You will need to undergo the NFA process with fingerprints, photos, and approval from your Chief Law Enforcement Officer or through a gun trust.
Q: Can I change the muzzle device?
A: Absolutely. The Phantom 5C2 is threaded onto the barrel with a standard 1/2×28 thread pitch. You can remove it and install any other muzzle device you like, though you’ll lose the quick-attach function for YHM suppressors.
Q: What’s the real benefit of a 10.5″ barrel in 5.56?
A: Maneuverability. In tight spaces, every inch counts. The ballistic performance is still effective for defensive ranges, and it’s much more pleasant to shoot than a pistol-caliber carbine. That said, it’s louder and has more muzzle blast than a longer barrel, which is why it pairs so well with a suppressor.
If a turn-key, quality SBR from a trusted name sounds like the right path for you, this YHM Black Diamond Specter is available at firearms-missouri.com for Missouri residents and nationwide. Start the conversation with your local FFL/SOT about the transfer process.
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