The Great Lakes Firearms and Ammunition AR-10 is a semi-automatic rifle in 6.5 Creedmoor built on a billet receiver set and finished in Great Lakes' Buck Cerakote pattern. The 20-inch stainless barrel with 5R rifling is the centerpiece of the accuracy package. 
 

Key Specifications 

• Caliber: 6.5 Creedmoor 
• Barrel Length: 20 inches 
• Capacity: 10 rounds 
• Weight: 8.6 lbs 
• Finish: Buck (Great Lakes Cerakote) 
• Manufacturer: Great Lakes Firearms and Ammunition 
• Model: AR-10 
• Type: Modern Sporting Rifle 
   

Detailed Features 

 
The barrel is 416R stainless steel with 5R rifling — the 5-groove design with angled lands produces less fouling buildup than conventional rifling and is used on several precision-oriented production rifles. Upper and lower receivers are machined from 7075 aluminum billet, which is stronger than forgings at comparable weight. 
 
The 15.125-inch M-Lok handguard gives you rail space for lights, bipods, or grips without significant weight penalty. The rifle-length gas system with a .750 gas block runs the AR-10 action softer than carbine-length setups at the expense of some impulse delay — a worthwhile trade-off on a 20-inch precision rifle. The mil-spec six-position stock adjusts for length of pull. 
 
Trigger pull is 5.5 to 6 lbs from the mil-spec unit. Functional for most shooting, though precision competitors often replace it with a lighter single-stage. 
 

Usage Scenarios 

• Long-range Shooting Competitions: 6.5 Creedmoor in a 20-inch barrel at 8.6 lbs is a practical precision rifle setup for PRS and similar formats. 
• Hunting: 6.5 Creedmoor is suitable for medium to large game at extended distances with appropriate bullet selection. 
• General Range Use: The semi-auto action with a 10-round magazine is easy to run for volume practice without slow bolt manipulation.

The Great Lakes AR-10 in 6.5 Creedmoor with Buck Cerakote is a relatively niche buy, and feedback reflects a small but generally satisfied owner base. Build quality comes up first — the billet receivers and 416R barrel are concrete upgrades over forged-receiver budget AR-10s, and owners notice the fit and finish difference.

The 5R rifling and 20-inch barrel combination draws specific interest from precision shooters. Reported accuracy is good for a factory semi-auto — most owners confirm sub-MOA or near-sub-MOA groups with quality 6.5 Creedmoor loads.

The Buck Cerakote finish is a distinguishing feature; it's a tan-and-brown pattern that's less common than standard black or FDE. Owners like the look and appreciate the corrosion protection it provides on a rifle used outdoors.

The weight at 8.6 lbs is what it is for a 20-inch AR-10 in this configuration. It's appropriate for bench or prone shooting and not ideal for fast-moving hunting situations. Some owners add a bipod and accept the extra weight for the stability it provides.

Aftermarket accessory compatibility is occasionally mentioned as a minor friction point — AR-10 pattern parts are not universally compatible across manufacturers the way AR-15 parts are. Most standard accessories fit, but a few specific items require verification before purchase.