Great Lakes Firearms AR-15 .450 Bushmaster 18" White 5-Round RifleGreat Lakes Firearms$869.00
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Great Lakes Firearms
The Great Lakes Firearms AR-15 .450 Bushmaster is a semi-automatic rifle built for hunters and shooters who want serious stopping power in a modern, modular platform. Chambered in .450 Bushmaster—a cartridge known for its hard-hitting performance on medium to large game—this 18-inch rifle strikes a balance between maneuverability and velocity. The 1:24 twist barrel stabilizes Bushmaster rounds reliably, while the 5-round magazine capacity keeps you ready for follow-up shots without excess bulk. Whether you're hunting hog, deer, or testing your skills at distance, this rifle delivers the accuracy and reliability you expect from an AR-pattern gun.
Built on a 7075 aluminum upper and lower receiver, this rifle is engineered for durability in demanding conditions. The 15.25-inch aluminum handguard features full picatinny rail coverage, giving you unlimited mounting options for optics, lights, or other tactical accessories. Mid-length gas tube and 0.750 gas block keep the system running smooth across a wide range of ammunition. A milspec 5.5–6 lb trigger gives you a predictable break, while the included muzzle brake helps manage recoil—welcome in a cartridge with .450 Bushmaster's punch. At 6.4 lbs unloaded, it's lightweight enough to carry all day but substantial enough to shoot confidently from the bench or in the field.
Great Lakes Firearms tops it off with a durable Cerakote finish and mil-spec polymer grip, designed to withstand hard use. The rifle ships with one 5-round magazine and a muzzle brake ready to install (wrench-tight without Loctite). No sights are included, leaving the optic choice entirely up to you—mount a low-power variable scope for hunting or a red dot for faster target work. This is a no-frills, purpose-built rifle for shooters who know what they want and value quality over hype.
| Caliber | .450 Bushmaster |
| Action | Semi-Automatic |
| Barrel Length | 18 inches |
| Barrel Twist | 1:24 |
| Barrel Material | 416R Stainless Steel or 4150 CRMOV Nitride |
| Muzzle Thread | 11/16 × 24 |
| Upper Receiver | 7075 Aluminum (Oversized) |
| Lower Receiver | 7075 Aluminum |
| Handguard | 15.25" Aluminum 6061, Full Picatinny Rail |
| Gas System | Mid-Length with 0.750" Gas Block |
| Feed Ramps | Modified M4 |
| Magazine Capacity | 5 Rounds |
| Magazines Included | 1 Magazine |
| Trigger | Milspec, 5.5–6 lb pull |
| Grip | Mil-Spec Polymer |
| Safety | Right-Hand Only |
| Sights | None Included |
| Muzzle Brake | Included |
| Finish | Cerakote |
| Overall Length | 35 inches |
| Weight | 6.4 lbs |
.450 Bushmaster is a hard-hitting straight-wall cartridge designed for hunting medium to large game. It's known for effective performance on deer, hog, and similar-sized game. It operates within the AR-15 platform, making it accessible to shooters already familiar with that rifle type.
Yes. This rifle ships without sights. However, the 15.25-inch picatinny rail handguard and upper receiver give you plenty of real estate to mount any optic you choose—whether that's a low-power variable scope for hunting or a red dot for faster work.
The rifle includes one 5-round magazine and a muzzle brake ready to install. You'll need to source optics, ammunition, and any additional accessories separately.
No. The safety is right-hand only. Left-handed shooters should be aware of this before purchase.
Great Lakes Firearms
The Great Lakes Firearms AR-15 .450 Bushmaster is a semi-automatic rifle built for hunters and shooters who want serious stopping power in a modern, modular platform. Chambered in .450 Bushmaster—a cartridge known for its hard-hitting performance on medium to large game—this 18-inch rifle strikes a balance between maneuverability and velocity. The 1:24 twist barrel stabilizes Bushmaster rounds reliably, while the 5-round magazine capacity keeps you ready for follow-up shots without excess bulk. Whether you're hunting hog, deer, or testing your skills at distance, this rifle delivers the accuracy and reliability you expect from an AR-pattern gun.
Built on a 7075 aluminum upper and lower receiver, this rifle is engineered for durability in demanding conditions. The 15.25-inch aluminum handguard features full picatinny rail coverage, giving you unlimited mounting options for optics, lights, or other tactical accessories. Mid-length gas tube and 0.750 gas block keep the system running smooth across a wide range of ammunition. A milspec 5.5–6 lb trigger gives you a predictable break, while the included muzzle brake helps manage recoil—welcome in a cartridge with .450 Bushmaster's punch. At 6.4 lbs unloaded, it's lightweight enough to carry all day but substantial enough to shoot confidently from the bench or in the field.
Great Lakes Firearms tops it off with a durable Cerakote finish and mil-spec polymer grip, designed to withstand hard use. The rifle ships with one 5-round magazine and a muzzle brake ready to install (wrench-tight without Loctite). No sights are included, leaving the optic choice entirely up to you—mount a low-power variable scope for hunting or a red dot for faster target work. This is a no-frills, purpose-built rifle for shooters who know what they want and value quality over hype.
| Caliber | .450 Bushmaster |
| Action | Semi-Automatic |
| Barrel Length | 18 inches |
| Barrel Twist | 1:24 |
| Barrel Material | 416R Stainless Steel or 4150 CRMOV Nitride |
| Muzzle Thread | 11/16 × 24 |
| Upper Receiver | 7075 Aluminum (Oversized) |
| Lower Receiver | 7075 Aluminum |
| Handguard | 15.25" Aluminum 6061, Full Picatinny Rail |
| Gas System | Mid-Length with 0.750" Gas Block |
| Feed Ramps | Modified M4 |
| Magazine Capacity | 5 Rounds |
| Magazines Included | 1 Magazine |
| Trigger | Milspec, 5.5–6 lb pull |
| Grip | Mil-Spec Polymer |
| Safety | Right-Hand Only |
| Sights | None Included |
| Muzzle Brake | Included |
| Finish | Cerakote |
| Overall Length | 35 inches |
| Weight | 6.4 lbs |
.450 Bushmaster is a hard-hitting straight-wall cartridge designed for hunting medium to large game. It's known for effective performance on deer, hog, and similar-sized game. It operates within the AR-15 platform, making it accessible to shooters already familiar with that rifle type.
Yes. This rifle ships without sights. However, the 15.25-inch picatinny rail handguard and upper receiver give you plenty of real estate to mount any optic you choose—whether that's a low-power variable scope for hunting or a red dot for faster work.
The rifle includes one 5-round magazine and a muzzle brake ready to install. You'll need to source optics, ammunition, and any additional accessories separately.
No. The safety is right-hand only. Left-handed shooters should be aware of this before purchase.