The Yankee Hill Machine Company Black Diamond Specter XL Carbine is a 5.56 NATO / .223 REM modern sporting rifle with a 16-inch barrel and a black finish. At 12.9 lbs., it runs heavier than some carbines in this class, though it's solid for the weight. 
 

Key Specifications 

• Barrel Length: 16 inches 
• Caliber: 5.56 NATO / .223 REM 
• Condition: New in Box 
• Finish Color: Black 
• Manufacturer: Yankee Hill Machine Company 
• Model: Black Diamond Specter XL Carbine 
• Type: Modern Sporting Rifle 
• Weight: 12.9 lbs. 
• Manufacturer Part Number: YHM-8820-7 
• UPC: 816701017984 
   

Detailed Features 

 
The 16-inch barrel gives you a reasonable balance of velocity and handling. The carbine is chambered for both 5.56 NATO and .223 REM, which keeps your ammunition options open. Controls are well-placed and the ergonomics accommodate extended range sessions without much fatigue. The black finish adds corrosion resistance. 
 

Target Audience 

 
Suitable for sport shooters, competitive shooters who want a 5.56 platform with modularity, and anyone looking at this caliber for home defense. The versatile chambering also works for varmint hunting. 
 

Usage Scenarios 

 
Works at the range for both precision and practical shooting. The 5.56 NATO chambering handles a wide variety of factory ammunition. At 12.9 lbs., it's not the lightest option for hunting or extended carries, but it's stable on supported positions.

Owners of the YHM Black Diamond Specter XL Carbine in 5.56 NATO generally speak well of the build quality. The rifle feels solid and the components hold up to regular range use.

Accuracy and consistency with various ammunition types come up often in a positive light. Ergonomics are well-regarded too — controls are accessible and the rifle handles comfortably.

Customization is a draw for many buyers. The modular platform takes optics, grips, and accessories without much fuss, and owners seem to enjoy dialing in their configurations.

On the critical side, the weight draws the most comment. At 12.9 lbs., some shooters find it heavier than competing rifles in this category, which affects how it handles during dynamic drills. Pricing is mixed — some consider it fair given the features, others feel it runs high relative to the competition.

Customer service experiences vary noticeably. Positive interactions exist, but there are also reports of slow response times and parts availability issues. It's not universal, but it shows up often enough to note.