Opticsplanet Exclusive Moriarti AR-9 Complete Upper Receiver Complete Upper Receiver 9mm Luger 8.3 Inch 1-10 Twist MLOK Handguard Anodized Black Black

Moriarti Complete Upper Receiver AR-15 5.56 Nato 16 Inch Barrel M4 Carbine Length 1X7 Twist 1/2X28 Thread M-LOK Handguard Triport Hardcoat Anodized

Aagil Arms Ted Nugent's Signature Series AR-15 Complete .300 Blackout Upper Receiver Assembly W/ 15in Gun Black Cerakote AA-CURK16300C15TNGB

Moriarti Complete Upper Receiver AR-9 9mm 4.5 Inch Barrel Straight Profile 1-10 Twist 1/2X36 Thread M-LOK Handguard Multiport Anodized Black Black

Moriarti Upper Receiver With Flash Hider AR-15 5.56 Nato 10.5 Inch Barrel Government Contour Carbine Length 1X7 Twist 1/2X28 Thread M-LOK Handguard A2

FM Products FM-45 AR Upper Receiver W/ Micro Brake .45 Caliber 10 Inch 10in Barrel Ultralight Profileflash Supressor Black FM45-FS-109

Tiger Rock AR-15 Complete Upper Receiver 5.56mm 24in 16in Barrel M4 Carbine 1X8 Twist 1/2X28 Thread 10in Quad Rail Handguard Brake Nitride Anodized

OP Exclusive Moriarti AR-15 Upper Receiver Assembly 5.56x45mm NATO 16in Mid M-LOK 1-7 Twist 1/2X28 Pinned Gas Block Diamond Cut Free-Float Handgrd A2