.450 Bushmaster AR-15 Upper Assemblies

.450 Bushmaster Upper Configurations

Explore Moriarti .450 Bushmaster AR-15 upper assemblies in compact and rifle-length configurations. Available options include multiple barrel lengths, black nitride and stainless finishes, M-LOK handguards, and distinctive muzzle devices. Compare .450 Bushmaster uppers by barrel specifications, rail design, and included components to find the configuration that fits your AR-15 platform.

What components are different when using a .450 Bushmaster upper?

A .450 Bushmaster upper uses caliber-specific components, including its barrel and compatible 458/450 face bolt. Proper magazine compatibility is also important. Review each upper assembly's specifications and included components before selecting supporting parts.