YHM MR7 SERIES UPPER RECEIVER GROUP 300BLK YHM-7305-300

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

ONE OH-CU05 10.5 300 BLACKOUT COMPLETE UPPER RCVR

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

CMMG Dissent Upper Group Mk4 300 Blk 6.5" Anodized Blk

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

ONE HORSE AR15 A3 Stripped Upper Receiver Anodized

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