Luth-AR Rifle Kit Bull 20" Fluted Upper with Fixed Stock - LUTH RKB201

Complete AR-15 rifle build kit featuring a 20" fluted bull barrel upper receiver with 15" Keymod handguard and choice of MBA-1 or MBA-3 fixed buttstock assembly. Kit includes fully assembled upper, complete lower parts kit, and all components except stripped lower receiver; compatible with AR-15 platforms and suitable for both new builders and experienced users.