5.56x45mm NATO Upper Receivers

Noveske AR-15 N4 Micro Switchblock Complete Upper Receiver 5.56x45mm NATO 10.5" Barrel NSR-9.75 M-LOK Handguard FDE

Noveske Ghetto Blaster Sniper Grey 556

Noveske Complete Upper .223 Rem / 5.56 18 Barrel Gen 3 for AR15

CMMG UPPER GROUP DISSENT Mk4 5.56mm 16.1in Empire Profile Non-Threaded Tungsten

CMMG UPPER GROUP DISSENT Mk4 5.56mm 16.1in Empire Profile Non-Threaded Midnight Bronze

CMMG UPPER GROUP DISSENT Mk4 5.56mm 16.1in Empire Profile Non-Threaded Coyote Tan

Presma AR-15 223/5.56 Stripped Upper Receiver w/Square Mark Black

Presma 223/5.56 Aluminum Ejection Port Dust Cover Assembly Brown

Presma 223/5.56 Aluminum Ejection Port Dust Cover Assembly Golden

Presma 223/5.56 Aluminum Ejection Port Dust Cover Assembly Silver

Stag Arms AR-15 A3 Flattop Upper Receiver Stripped Direct Impingement Type 3 Hard Coat Anodized Left Hand Black

Stag Arms AR-15 Tactical Upper Receiver 5.56x45mm NATO 7.5in Barrel GOV-CMV Profile 1-7 Twist 1/2x28 Left Hand VG6 Delta Chromephos FDE

Stag Arms AR-15 Tactical Right Hand Upper Receiver 5.56 NATO 10.5in Barrel GOV-CMV Profile 1-7 Twist 1/2 x 28 Thread VG6 Delta FDE

Stag Arms AR-15 Tactical Upper Receiver 5.56x45mm NATO 10.5in Barrel GOV-CMV Profile 1-7 Twist 1/2x28 Left Hand VG6 Delta Black

Stag Arms AR-15 Tactical Left Hand Upper Receiver 5.56 NATO 16in Barrel Hanson Profile 1-7 Twist 1/2 x 28 Thread VG6 Delta Nitride Black

Stag Arms AR-15 3-Gun Elite Left HandUpper Receiver 5.56 NATO 18in Barrel Heavy-Fluted Profile 1-8 Twist VG6 Gamma Black

Stag Arms AR-15 3-Gun Elite Right HandUpper Receiver 5.56 NATO 18in Barrel Heavy-Fluted Profile 1-8 Twist VG6 Gamma Black

Stag Arms AR-15 Upper Right Hand Receiver 5.56 NATO 16in Barrel M4 Profile 1-7 Twist 1/2 x 28 Thread A2 Birdcage Flash Hider Black

Stag Arms AR-15 A3 Stripped Upper Receiver .223/5.56mm Type 3 Hard Coat Anodized Right Hand Black

Aero Precision M4E1-T PRO CHF M4 5.56mm 16 inch Complete Upper Receiver Hanson Mid Length 1-7 Twist A2 Birdcage Anodized Kodiak Brown

Aero Precision M4E1-T PRO CHF M4 5.56mm 16 inch Complete Upper Receiver Hanson Mid Length 1-7 Twist A2 Birdcage Anodized OD Green

Aero Precision M4E1-T PRO CHF M4 5.56mm 16 inch Complete Upper Receiver Hanson Mid Length 1-7 Twist A2 Birdcage Anodized Black

Aero Precision MOD4 15 18 Inch 223 Wylde PROOF 5.56x45MM M4E1-T Complete Upper Receiver OD Green

Aero Precision M4E1-T 5.56x45 10.6 inch MOD 4 Upper Receiver Government Carbine Length 1 in 7 Twist A2 Bird Cage Kodiak Brown