Great Lakes Firearms AR-15 .450 Bushmaster 18" ODG/SS 5-Round RifleGreat Lakes Firearms$869.00
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Great Lakes Firearms
The Great Lakes Firearms AR-15 .450 Bushmaster is a purpose-built rifle for hunters and shooters who want serious stopping power in a modern, versatile platform. Chambered in .450 Bushmaster—a cartridge renowned for short-to-medium-range hunting and barrier-blind performance—this 18-inch rifle delivers the leverage of a straight-walled cartridge in a configuration that handles like a traditional AR, making it an excellent choice for hunters transitioning from .223 or those simply after a hard-hitting, manageable package.
Built on a 7075 aluminum frame and oversized upper receiver, the rifle balances weight and durability. The 18-inch barrel sports a 1:24 twist and comes threaded 11/16 x 24 with a muzzle brake already installed—no wrench-on-with-Loctite hassles. You get your choice of barrel material (416R stainless steel or 4150 CRMOV with nitride finish), a mid-length gas system anchored by a .750 gas block, and a full Picatinny rail on the 15.25-inch aluminum handguard for mounting optics, lights, or accessories. The rifle ships in ODG (Olive Drab Green) Cerakote, adding a rugged aesthetic to a practical tool.
At 6.4 pounds and 35 inches overall, it's maneuverable in brush and trucks without feeling like a toy. The trigger breaks at a mil-spec 5.5–6 lb pull, suitable for hunting and field work. Modified M4 feed ramps ensure reliable feeding, and the aluminum Mil-spec grip is ergonomic and proven. You'll receive one 5-round magazine to start—appropriate for most hunting regulations and the cartridge's ballistics. No irons are included; plan for an optic or add your own sights.
This is a no-frills, well-engineered .450 Bushmaster that respects the cartridge's strength and the AR platform's modularity, ideal for serious hunters who understand the round's real-world capabilities and limitations.
| Caliber | .450 Bushmaster |
| Action | Semi-automatic |
| Barrel Length | 18 inches |
| Barrel Twist | 1:24 |
| Barrel Material | 416R stainless steel or 4150 CRMOV with nitride finish (user choice) |
| Muzzle Threading | 11/16 x 24 |
| Muzzle Brake | Included |
| Gas System | Mid-length with .750 gas block |
| Upper Receiver | 7075 aluminum, oversized |
| Frame Material | 7075 aluminum |
| Handguard | 15.25-inch aluminum 6061 with full Picatinny rail |
| Trigger | Mil-spec, 5.5–6 lb pull |
| Grip | Mil-spec polymer |
| Magazine Capacity | 5 rounds |
| Magazines Included | 1 |
| Feed Ramps | Modified M4 |
| Sights | None (optic-ready rail) |
| Finish | Cerakote (ODG) |
| Overall Length | 35 inches |
| Weight | 6.4 lbs |
.450 Bushmaster is a straight-walled, large-bore cartridge known for hunting medium to large game at moderate distances. It offers significant stopping power and is legal for hunting in many jurisdictions with straight-walled cartridge requirements.
No sights are included. The rifle features a full Picatinny rail on the handguard, making it ready to mount your choice of rifle scope, red dot, or other optic.
The rifle is configured for 5-round magazines. One 5-round magazine is included with your purchase.
Yes. The rifle ships with a Picatinny rail handguard, allowing you to mount lights, lasers, and optics. The threaded muzzle accepts aftermarket brakes or suppressors (where legal), and the AR platform is modular—you can swap grips, triggers, and other components as desired.
Great Lakes Firearms
The Great Lakes Firearms AR-15 .450 Bushmaster is a purpose-built rifle for hunters and shooters who want serious stopping power in a modern, versatile platform. Chambered in .450 Bushmaster—a cartridge renowned for short-to-medium-range hunting and barrier-blind performance—this 18-inch rifle delivers the leverage of a straight-walled cartridge in a configuration that handles like a traditional AR, making it an excellent choice for hunters transitioning from .223 or those simply after a hard-hitting, manageable package.
Built on a 7075 aluminum frame and oversized upper receiver, the rifle balances weight and durability. The 18-inch barrel sports a 1:24 twist and comes threaded 11/16 x 24 with a muzzle brake already installed—no wrench-on-with-Loctite hassles. You get your choice of barrel material (416R stainless steel or 4150 CRMOV with nitride finish), a mid-length gas system anchored by a .750 gas block, and a full Picatinny rail on the 15.25-inch aluminum handguard for mounting optics, lights, or accessories. The rifle ships in ODG (Olive Drab Green) Cerakote, adding a rugged aesthetic to a practical tool.
At 6.4 pounds and 35 inches overall, it's maneuverable in brush and trucks without feeling like a toy. The trigger breaks at a mil-spec 5.5–6 lb pull, suitable for hunting and field work. Modified M4 feed ramps ensure reliable feeding, and the aluminum Mil-spec grip is ergonomic and proven. You'll receive one 5-round magazine to start—appropriate for most hunting regulations and the cartridge's ballistics. No irons are included; plan for an optic or add your own sights.
This is a no-frills, well-engineered .450 Bushmaster that respects the cartridge's strength and the AR platform's modularity, ideal for serious hunters who understand the round's real-world capabilities and limitations.
| Caliber | .450 Bushmaster |
| Action | Semi-automatic |
| Barrel Length | 18 inches |
| Barrel Twist | 1:24 |
| Barrel Material | 416R stainless steel or 4150 CRMOV with nitride finish (user choice) |
| Muzzle Threading | 11/16 x 24 |
| Muzzle Brake | Included |
| Gas System | Mid-length with .750 gas block |
| Upper Receiver | 7075 aluminum, oversized |
| Frame Material | 7075 aluminum |
| Handguard | 15.25-inch aluminum 6061 with full Picatinny rail |
| Trigger | Mil-spec, 5.5–6 lb pull |
| Grip | Mil-spec polymer |
| Magazine Capacity | 5 rounds |
| Magazines Included | 1 |
| Feed Ramps | Modified M4 |
| Sights | None (optic-ready rail) |
| Finish | Cerakote (ODG) |
| Overall Length | 35 inches |
| Weight | 6.4 lbs |
.450 Bushmaster is a straight-walled, large-bore cartridge known for hunting medium to large game at moderate distances. It offers significant stopping power and is legal for hunting in many jurisdictions with straight-walled cartridge requirements.
No sights are included. The rifle features a full Picatinny rail on the handguard, making it ready to mount your choice of rifle scope, red dot, or other optic.
The rifle is configured for 5-round magazines. One 5-round magazine is included with your purchase.
Yes. The rifle ships with a Picatinny rail handguard, allowing you to mount lights, lasers, and optics. The threaded muzzle accepts aftermarket brakes or suppressors (where legal), and the AR platform is modular—you can swap grips, triggers, and other components as desired.