5.56x45mm NATO Upper Receivers

APF Armory AR-15 SBR Complete Upper Receiver 5.56x45mm NATO 10.5" Barrel 9" M-LOK Handguard with Magpul Sights

Maxim Defense MDX 510 AR-15 Complete Upper Receiver 5.56x45mm 10.3" Barrel Black

Maxim Defense MDX 508 AR-15 Complete Upper Receiver 5.56x45mm 8.5" Barrel Arid

Maxim Defense Industries PDX Kit 5.56 5.5 Barrel Upper and Brace

Maxim Defense Industries PDX Kit Flat Dark Earth 5.56 5.5 Barrel 20-Rounds Threaded

SOLGW EAST INDIA KIT 5.56 12.5" BLK

SOLGW EAST INDIA KIT 5.56 16" BLK

M4-89 5.56x45 Nato Assembled Upper Receiver - M4-89 5.56x45 Nato 12.5'''' Bbl 11.5'''' M89 Rail W/A2 Flash Hider

SOLGW EAST INDIA KIT 5.56 14.5" BLK

SOLGW EAST INDIA KIT 5.56 11.5" BLK

SOLGW EAST INDIA KIT 5.56 13.9" BLK

ANDERSON Complete Upper 5.56 10.5" with BCG and CH

SOLGW L89 BS V2 5.56 13.7" NOX BLK

Sons of Liberty Gun Works SOLGW M4-L89 Broadsword 5.56mm 12.5" No BCG/CH Upper Receiver M4L89BSUPPER-12.5-556

Sons of Liberty Gun Works SOLGW M4-L89 Broadsword 5.56mm 11.5" No BCG/CH Upper Receiver M4L89BSUPPER-11.5-556

Sons of Liberty Gun Works SOLGW L89 5.56mm 13.7" No BCG/CH Upper Receiver w/SF Compatible/ROTEX Mount M4L89UPPER-13.7-556-SF

SOLGW L89 V2 5.56 13.7" NOX BLK

Sons of Liberty Gun Works SOLGW L89 5.56mm 16" No BCG/CH Upper Receiver M4L89UPPER-16-556

Sons of Liberty Gun Works SOLGW L89 5.56mm 14.5" No BCG/CH Upper Receiver w/HUXWRX Mount M4L89UPPER-14.5-556-HUX

Sons of Liberty Gun Works AR-15 M4-EXO3 Complete Upper Receiver 5.56x45mm 14.5" Barrel No Muzzle Device

Anderson Manufacturing AR15A3UPFORUMTCOM A3 Upper NO BBL

SONS M4L8914.5ASR 556 CHF V2 BRDSWRD UPPER

SOLGW M4L89UPPER13.9556NMD L89 UPPER 555 13.9 V2

M4-L89 5.56x45 Nato Assembled Upper Receiver - M4-L89 5.56x45 Nato 11.5''''bbl 10.75'''' L89 Rail W/Nox9