Great Lakes Firearms AR-15 .450 Bushmaster 18" 5-Rd Semi-Auto Rifle - Flat Dark Earth

The Great Lakes Firearms AR-15 in .450 Bushmaster is a semi-automatic rifle built on the familiar AR-15 platform and chambered for a straight-walled, big-bore hunting cartridge. This variant wears a Flat Dark Earth finish on the receiver and furniture, paired with an 18" nitride-treated barrel for durability and corrosion resistance.

The action is a standard AR-15-pattern semi-automatic with a 5-round capacity appropriate for the straight-walled .450 Bushmaster chambering. The 18" barrel is finished in black nitride and features a 1:24" twist optimized for stabilizing heavy, wide-diameter projectiles. The rifle ships with no iron sights installed, leaving the optic rail ready for the scope or red dot of your choice.

Controls and furniture follow familiar AR-15 conventions: a Milspec trigger with a 5.5-6 lb pull weight, a right-hand configuration, and standard AR-15 furniture in a matching Flat Dark Earth finish. Overall length measures 35.00" and the rifle weighs in at 6.4 lbs, giving it a balanced, manageable feel whether at the bench or in the field.

Chambered in .450 Bushmaster, this rifle is built around the standard AR-15 lower receiver platform and uses modified magazines designed to handle the larger straight-walled .450 Bushmaster cartridge. The straight-walled cartridge makes this a practical option for hunters working in areas where straight-walled cartridges are required, as well as for shooters looking for a hard-recoiling, big-bore rifle for range and field use.

DISCLAIMER: Firearms and receivers are subject to state-specific shipping restrictions and must be transferred through a valid FFL dealer. Please visit our shipping restrictions page to review all applicable restrictions for your state. Subject to change.