Luth-AR Rifle Kit Bull 20" Fluted with Adjustable Stock - LUTH RKB203

Complete AR-15 build kit featuring a 20" fluted bull barrel upper receiver with 15" Keymod handguard and choice of MBA-1 or MBA-3 adjustable buttstock assembly. Kit includes fully assembled upper, lower parts kit, and all components needed to build a functional rifle except the stripped lower receiver. Compatible with standard AR-15 platforms and supports optional add-on upgrades.