.400 Legend Kits For Sale / Moriarti Arms

80% Build Kits

Build your next straight-wall cartridge rifle with 400 Legend AR-15 kits from Moriarti Armaments. Our selection includes complete rifle and pistol kits featuring quality components, multiple barrel lengths, and modern M-LOK handguards. Designed for compatibility with most mil-spec AR-15 lower receivers, these kits are ideal for hunting, recreational shooting, and custom firearm builds.

Do 400 Legend AR-15 kits include a lower receiver?

No. 400 Legend AR-15 kits do not include a lower receiver. A compatible lower receiver must be purchased separately before the firearm can be completed.