The Great Lakes Firearms and Ammunition AR-10 is a semi-automatic rifle chambered in .308 Winchester with an 18-inch barrel, billet 7075 aluminum receivers, and a Black Cherry finish. The 5R rifling and 1/10" twist rate are optimized for .308 Win projectiles at this barrel length. 
 

Key Specifications 

• Model: AR-10 
• Caliber: .308 Win 
• Barrel Length: 18 inches 
• Action: Semi-Auto 
• Capacity: 10 rounds 
• Overall Length: 38.5 inches 
• Weight: 8.25 lbs 
• Finish Color: Black Cherry 
   

Features 

The upper and lower receivers are billet 7075 aluminum, which is stronger than the cast aluminum found in some AR builds. The 18-inch barrel uses 5R rifling, which has fewer lands and grooves than traditional 6-groove rifling and can be easier to clean. It's double stress-relieved to reduce warping under repeated firing. The 15.125-inch M-Lok handguard is 6061 aluminum, lighter than the 7075 used in the receivers. The trigger pull is mil-spec at 5.5-6 lbs. The adjustable buttstock and polymer grip are standard AR components. 
 
The Black Cherry finish is a cerakote-type coating that distinguishes this rifle visually from standard black AR-10s. 
 

Usage 

At 8.25 lbs with an 18-inch barrel, this sits in a useful middle ground between a 16-inch carbine and a 20-inch precision setup. It's capable for hunting medium and large game, competitive shooting in .308 classes, and range work.

The Great Lakes AR-10 in .308 Win gets generally positive feedback, with the Black Cherry finish and build quality drawing the most attention.

Aesthetics come up often — the Black Cherry finish stands out and owners who specifically wanted something different from standard black ARs are satisfied. Build quality reviews are positive overall, with the billet receiver construction noted as a solid base.

Accuracy is rated well for hunting and general range use. Owners report consistent performance at typical hunting distances and find the semi-auto action smooth for follow-up shots.

Weight is a practical concern at 8.25 lbs. Some owners find it heavy for extended field carry, though it's comparable to other AR-10 builds in the 18-inch barrel configuration. Aftermarket parts and accessories specific to this platform are less available than for more established AR-10 manufacturers, which comes up in discussions about customization.

Overall the rifle is well-regarded for its build quality and distinctive finish. Buyers who specifically want an AR-10 in .308 Win with billet construction and a non-standard finish tend to be satisfied.