Palmetto State Armory 16" Mid-Length 5.56 NATO 1:7 Nitride M-LOK Upper Receiver

Radical Firearms 16" 5.56 NATO 1:7 Mid-Length SOCOM Barreled Upper - 12" M-LOK FCR Rail - Open Box

Expo Arms 16" 5.56 NATO AR-15 Barreled Upper Receiver - 15" M-LOK Handguard - A2 Flash Hider - Open Box

AERO PRECISION AR15 5.56 NATO / 223 Rem 20" Complete Upper Receiver w/ Carry Handle | Black

Geissele Automatics 5.56 USASOC Improved Complete Near-Clone AR-15 Upper Receiver - Desert Dirt- 10.3" - Open Box

Radical Firearms 16" 5.56 NATO 1:7 Mid-Length SOCOM Complete Upper - 12" M-LOK FCR Rail

Bushmaster AR-15 Complete Upper Minimalist SD 556 Nato AR15 16" 90025

Geissele Automatics Border Patrol Center Tab MK20 Assembled AR-15 Upper Receiver - 9.6" - BLEMULA