This is a Luth-AR Upper known as the Carbine chambered in 223 Remington, model RKB-16-3.
This kit contains everything you need to build your own AR except the stripped lower receiver. The Kit Contains: Fully assembled 16" .223 Rem Fluted Bull Barrel Upper with 15" Keymod Palm Handguard(R)" MBA-3 Adjustable Carbine Buttstock Assembly" Complete Lower Parts Kit. This Kit does not come with the lower receiver. You will have to supply a lower receiver purchased elsewhere. A Milspec lower is recommended.
Features:
HG-V-15K – Palm Handguard® – Vented 15″ KeyMod with Barrel Nut
BL-B16FT – 16″ Bull Barrel, Fluted, Threaded 416 SST
FTT-EA1 – A3 Upper Receiver Assembled
BC-A-223 – Fully Assembled Bolt Carrier – .223
UR-19 — Charging Handle
MBA-3 Adjustable Carbine Buttstock Assembly
LRPK-1 Complete .223/5.56 Lower Receiver Parts Kit
