Stag Arms AR-10 Stag 10 Upper Receiver, Assembly, .210 DPMS High Profile, Left Hand, Cerakote, FDE, STAG310880

Rock River Arms BT-3 Completed Upper Receiver, 6.5mm Creedmoor, 28In, 20in Barrel, Standard SS Fluted Profile, 1-10 Twist, 5/8X24 Thread, M-LOK Handguard, Black, 65C0568BT

Rock River Arms Completed Upper Receiver Standart A4 .308/7.62x51mm NATO 20 Inch Barrel 1-10 Twist 5/8-24 Thread A2 Handguard A2 Flash Hider Black

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Pistol M-LOK Handguard Complete Upper Receiver W/BCG And Charging Handle, Flat Dark Earth, UA300-BR7.5-ML7D-FDE

CMMG Banshee Upper Receiver Group, 5.7X28mm, 8In, Armor Black, 57B88BD-AB

J&E Machine Tech AR15 Polymer Vice Block Upper Receiver Black

Doublestar Barreled Upper Receiver .224 Valkyrie 24 Inch Barrel Bull Profile Diamond National Free Float Handguard Black ARBU110

Aero Precision M4E1 Threaded Assembled Upper Receiver, M16/AR-15, Magpul Cerakote, Sniper Grey, APAR700272AC

HIPP Customs Complete Upper Receiver 25.5in 16in Barrel 1-7 Twist Hipp Lite Weight Handguard Black/Red 16.0in HC15UPRRD

CMMG Resolute Upper Receiver Group, 5.7X28mm, 16.1In, Armor Black, 57B40E4-AB

CMMG 9mm Banshee Upper Group Receiver, 5In, 1-10 Twist, 1/2 X 28 TPI, 13.7In, Tungsten, 99B17FD-TNG

CMMG Mk4 .300BLK Banshee Upper Group Receiver, 8In, 1-7 Twist, 5/8 X 24 TPI, 16.5In, Armor Black, 30B81F4-AB

UNIT ASSY-BCM & RECEIVER 95400B8DT1 For MAXCURZ 2016-

Luth-AR Stripped A2 Upper Receiver W/ Rear Sight Cut, AR-15, 5.56x45mm NATO/ .223, 7.75in Length, 7075-T6 Aluminum, Anodized, Black, UR-A2-S

Luth-AR Stripped A2 Upper Receiver W/ Rear Sight Cut, AR-15, 5.56x45mm NATO/ .223, 7.75in Length, 7075-T6 Aluminum, Anodized, Black, UR-A2-S

APF 6mm Creedmoor DMR 2.0 Complete Upper Receiver Armor Black UP1074

Larue Tactical Complete Match Grade Upper Receiver, 22In, 6.5 Creedmoor, 1-8 Twist, A2 Flash Hider, Black, LT-018

Bushmaster Bravo Zulu A4 5.56 NATO Upper Receiver 16In, 1-8 Twist, Black, 00-40006-BLK

Lantac USA LLC SF 15 Patrol, Complete Upper Receiver, 223 Wylde, 14.5 Barrel, Fits AR-15, Anodized Finish, Black 01-FA-223-PATROL-UPR

Obsidian Arms Yellow Ar-15 Upper Receiver Vice Block, Hdpe, Oa-Vbua

Stag Arms AR-15 Upper Right Hand Receiver, 5.56 NATO, 16in Barrel, NJ Compliant, M4 Profile, 1-7 Twist, 1/2 X 28 Thread, Compensator, Black, STAG15101113

DPMS AR-10 Upper Receiver Claw Block One Size DP51655131036