5.56x45mm NATO Upper Receivers

Diamondback Firearms AR-15 DB15 Diamond Series Barreled Upper Receiver 5.56x45mm NATO 16" Midnight Bronze

Diamondback Firearms AR-15 DB15 Diamond Series Barreled Upper Receiver 5.56x45mm NATO 16" Flat Dark Earth

Diamondback Firearms AR-15 DB15 Diamond Series Barreled Upper Receiver 5.56x45mm NATO 16" Black

Diamondback Firearms DB15 556 NATO FDE MLok Handguard DB15MZFDE

CMMG UPPER M4 5.56/16IN SSBB/

Tiger Rock AR-15 Tribal Dust Cover W/ Option Caliber Engraving .223/5.56mm Red Small

Tiger Rock AR-15 Tribal Dust Cover W/ Option Caliber Engraving .223/5.56mm Blue Small

Tiger Rock AR-15 Tribal Dust Cover W/ Option Caliber Engraving .223/5.56mm Black Small

Tiger Rock Complete Upper Receiver AR-15 5.56 NATO 16in Carbine Length 1-8 Twist w/10in M-LOK Handguard Black Large

Tiger Rock Complete Upper Receiver AR-15 5.56 NATO 10in Carbine Length 1-8 Twist w/ 10in M-LOK Handguard Black Large

Tiger Rock Complete Upper Receiver AR-15 5.56 NATO 7in Pistol Length 1-8 Twist w/ 7in Super Slim M-LOK Handguard Black Large

Tiger Rock Complete Upper Receiver AR-15 5.56 NATO 7in Pistol Length 1-8 Twist w/ 4in Super Slim Hanguard Black Large

Tiger Rock Complete Upper Receiver AR-15 5.56 NATO 16in Mid Length 1-7 Twist w/ 16in Keymod Handguard Black Large

Tiger Rock AR-15 Super Slim Light Handguard Kit 5.56mm 12 in 16in Barrel M4 A2/Government Pistol 1x7 Twist 1/2x28 Thread 15in M-Lok Handguard Brake

Tiger Rock AR-15 Complete Upper Receiver 5.56mm 24in 16in Barrel M4 Carbine 1x8 Twist 1/2x28 Thread Quad Rail 15in M-Lok Handguard Brake Nitride

Tiger Rock AR-15 Ejection Port Cover & Dust Cover Assembly Pumpkin .223/5.56 Black Small

Tiger Rock AR-15/47/9/300 Stripped Upper Receiver Cerakote Burnt Bronze Medium

Tiger Rock AR-15 Ejection Port Cover & Dust Cover Assembly Jason Happy Camper Black Small

Spikes Tactical Upper 5.56 18in LW SPR w/13.2in BAR2 Rail

Spikes Tactical Upper 5.56 16in Midlength LE w/MOE BLK SL Handguard

Spikes Tactical Upper 5.56 16in M4 LE w/MOE Grey SL Handguard

Spikes Tactical Upper 5.56 16in CHF Midlength w/ 9in BAR2 Rail

Spikes Tactical Upper 5.56 16in CHF Midlength w/ 13.2in BAR2 Rail

Spikes Tactical Upper 5.56 16in CHF Midlength w/ 10in BAR2 Rail