The Great Lakes Firearms GL-15 RIA is a semi-automatic AR-style rifle chambered in .450 Bushmaster with an 18-inch barrel. It ships with a single 5-round magazine and uses a detachable magazine feed. The rifle features an M-LOK aluminum handguard, a synthetic adjustable stock, and a black Cerakote finish. Some published measurements and component materials differ between sources; see notes for items needing review.
Key Specifications
- Chambered in .450 Bushmaster.
- The barrel measures 18 inches.
- The action is Semi-Automatic.
- Barrel twist is 1:24″.
- Includes a single 5-round magazine.
- Equipped with a detachable magazine.
- Handguard is an M-LOK aluminum design.
- Stock material is synthetic with an adjustable configuration.
- Finish is black Cerakote.
- Includes a muzzle brake.
The GL-15 RIA integrates a large-caliber chambering into a familiar AR platform, offering modularity and a controllable magazine configuration for applications that benefit from a heavy-bullet option. Its M-LOK handguard and mil-spec controls provide a straightforward foundation for shooters seeking a practical, no-nonsense rifle platform.
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