LEAD & STEEL ARC Mil-Spec Stripped Upper Gray

GUNTEC AR15 SLABSIDE STRIPPED BILLET UPPER RECEIVER BLACK

ONE HORSE AR15 A3 Stripped Upper Receiver Anodized

TACFIRE AR-15 Billet Slick Upper Receiver Black

AERO PRECISION M4E1-T 5.56 NATO 11.5" Complete Upper Receiver | Black

Wraithworks Billet Slick Side AR-15 Upper Receiver - Black | No Forward Assist or Brass Deflector

AERO PRECISION M5 20" .308 CMV Complete Upper Receiver w/ ATLAS S-ONE M-Lok 15" Handguard

BEAR CREEK ARSENAL 300 B/O COMPLETE UPPER 7.5 BRL 1:7 TWIST PISTOL LENGTH GAS MLOK