Great Lakes Firearms120916718
Great Lakes Firearms AR-15 .450 Bushmaster 18" ODG 5-Round Rifle$869.00
Availability: In Stock
Current Stock: Out of stock
The Great Lakes Firearms AR-15 .450 Bushmaster is a purpose-built rifle for hunters who demand serious stopping power in an MSR platform. Chambered in .450 Bushmaster, this 18-inch rifle bridges the gap between tactical modularity and hunting effectiveness—offering the customization potential of an AR with caliber selection proven for medium to large game. With an 18-inch barrel, mid-length gas system, and compact 35-inch overall length, it's maneuverable in brushy terrain while maintaining the velocity and power the cartridge is known for.
Built on a 7075 aluminum receiver set with an oversized upper for solid lockup, this rifle comes configured for immediate use: one 5-round magazine included, full-length Picatinny rail (15.25 inches of 6061 aluminum handguard), and a muzzle brake designed for zero-loctite wrench installation. The 1:24 twist barrel is available in either 416R stainless steel or 4150 CMV nitride finish, both threaded 11/16x24. A standard mil-spec trigger with 5.5–6 lb pull and mil-spec polymer grip round out the controls. At 6.4 lbs, it's light enough for a day in the field without unnecessary fatigue.
Whether you're new to the .450 Bushmaster or adding to an existing .450 collection, this rifle's straightforward feature set—no frills optic or backup sights included—gives you a clean slate to configure exactly how you hunt. The modified M4 feed ramps and 0.750 gas block ensure reliable feeding and cycling with both factory and handloaded ammunition.
| Caliber | .450 Bushmaster |
| Barrel Length | 18 inches |
| Barrel Twist Rate | 1:24 |
| Barrel Threading | 11/16 x 24 |
| Barrel Material Options | 416R Stainless Steel or 4150 CMV Nitride |
| Upper Receiver | 7075 Aluminum, Oversized |
| Lower Receiver / Frame Material | 7075 Aluminum |
| Handguard | 15.25" 6061 Aluminum with full Picatinny rail |
| Gas System | Mid-length with 0.750 gas block |
| Feed Ramps | Modified M4 |
| Magazine Capacity | 5 rounds |
| Magazines Included | 1 |
| Trigger | Mil-spec, 5.5–6 lb pull |
| Grip | Mil-spec polymer |
| Safety | Right-side only |
| Muzzle Device | Brake (included) |
| Sights | None (picatinny rail ready) |
| Finish | Cerakote |
| Overall Length | 35 inches |
| Weight | 6.4 lbs |
The .450 Bushmaster is a dedicated hunting cartridge designed for medium to large game. It's particularly effective in AR platforms where hunters want increased stopping power compared to standard rifle cartridges, all while retaining AR ergonomics and customization.
No—this rifle ships with no sights. The full-length Picatinny rail on the handguard and receiver give you complete freedom to mount the optic, laser, or backup sights that suit your hunting or range plan.
This rifle comes with one 5-round magazine and uses a standard AR magazine well. Magazine compatibility depends on the specific magazine model and .450 Bushmaster geometry; we recommend consulting with the manufacturer or a local gunsmith if you're uncertain about fit with aftermarket mags.
No—the safety is right-side only. This is a common configuration on value-minded ARs; if you need ambidextrous controls, aftermarket safeties are readily available and easily swapped.
SKU: 120918343 • Weight: 9.44oz
Availability: In Stock
Current Stock: Out of stock
The Great Lakes Firearms AR-15 .450 Bushmaster is a purpose-built rifle for hunters who demand serious stopping power in an MSR platform. Chambered in .450 Bushmaster, this 18-inch rifle bridges the gap between tactical modularity and hunting effectiveness—offering the customization potential of an AR with caliber selection proven for medium to large game. With an 18-inch barrel, mid-length gas system, and compact 35-inch overall length, it's maneuverable in brushy terrain while maintaining the velocity and power the cartridge is known for.
Built on a 7075 aluminum receiver set with an oversized upper for solid lockup, this rifle comes configured for immediate use: one 5-round magazine included, full-length Picatinny rail (15.25 inches of 6061 aluminum handguard), and a muzzle brake designed for zero-loctite wrench installation. The 1:24 twist barrel is available in either 416R stainless steel or 4150 CMV nitride finish, both threaded 11/16x24. A standard mil-spec trigger with 5.5–6 lb pull and mil-spec polymer grip round out the controls. At 6.4 lbs, it's light enough for a day in the field without unnecessary fatigue.
Whether you're new to the .450 Bushmaster or adding to an existing .450 collection, this rifle's straightforward feature set—no frills optic or backup sights included—gives you a clean slate to configure exactly how you hunt. The modified M4 feed ramps and 0.750 gas block ensure reliable feeding and cycling with both factory and handloaded ammunition.
| Caliber | .450 Bushmaster |
| Barrel Length | 18 inches |
| Barrel Twist Rate | 1:24 |
| Barrel Threading | 11/16 x 24 |
| Barrel Material Options | 416R Stainless Steel or 4150 CMV Nitride |
| Upper Receiver | 7075 Aluminum, Oversized |
| Lower Receiver / Frame Material | 7075 Aluminum |
| Handguard | 15.25" 6061 Aluminum with full Picatinny rail |
| Gas System | Mid-length with 0.750 gas block |
| Feed Ramps | Modified M4 |
| Magazine Capacity | 5 rounds |
| Magazines Included | 1 |
| Trigger | Mil-spec, 5.5–6 lb pull |
| Grip | Mil-spec polymer |
| Safety | Right-side only |
| Muzzle Device | Brake (included) |
| Sights | None (picatinny rail ready) |
| Finish | Cerakote |
| Overall Length | 35 inches |
| Weight | 6.4 lbs |
The .450 Bushmaster is a dedicated hunting cartridge designed for medium to large game. It's particularly effective in AR platforms where hunters want increased stopping power compared to standard rifle cartridges, all while retaining AR ergonomics and customization.
No—this rifle ships with no sights. The full-length Picatinny rail on the handguard and receiver give you complete freedom to mount the optic, laser, or backup sights that suit your hunting or range plan.
This rifle comes with one 5-round magazine and uses a standard AR magazine well. Magazine compatibility depends on the specific magazine model and .450 Bushmaster geometry; we recommend consulting with the manufacturer or a local gunsmith if you're uncertain about fit with aftermarket mags.
No—the safety is right-side only. This is a common configuration on value-minded ARs; if you need ambidextrous controls, aftermarket safeties are readily available and easily swapped.
SKU: 120918343 • Weight: 9.44oz