Palmetto State Armory Sabre 5.56 14.7" Forged Upper Receiver with Geissele MK14 DDC Pin/Weld JMAC Keymo Mount

Geissele Automatics Super Duty MOD1 5.56 NATO Complete Upper Receiver - 14.5" Pinned - DDC - Open Box

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

CMMG 55BB40BMB Resolute MK4 5.56x45mm NATO 16.10", Midnight Bronze, M-LOK Free-Float Handguard for AR-Platform (No BCG or Charging Handle)

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 Barreled Upper - 12" M-LOK FCR Rail - Open Box

Daniel Defense V7 URG 5.56 NATO Barreled Upper Receiver - 11.5" - Primary Arms Exclusive - Open Box

Geissele Automatics Super Duty Center Tab MK16 Upper Kit - Assembled Upper - Black - 15" - BLEMULA