5.56x45mm NATO Upper Receivers

LaRue Tactical Match Grade Complete AR-15 Upper Receiver - 5.56 - 12" - FDE

LaRue Tactical Match Grade Complete AR-15 Upper Receiver - 5.56 - 12"

Harrington & Richardson M16A2 Stripped Upper Receiver w/ M4 Feed Ramp, Black

Harrington & Richardson 733 Complete 11.5" Upper, Black

Harrington & Richardson Retro M16A1 20" AR-15 Upper 5.56 1:7 Rifle Length, Black

Harrington & Richardson DMR Complete 20" Upper, 1/7, Black

Harrington & Richardson M16A2 Chrome Lined Complete Upper, Black

Harrington & Richardson M16A2 Stripped Upper Receiver, Black

CMMG Dissent Mk4 5.56mm 16.1in Upper Group 1-7 Twist 1/2 X 28 TPI .750in 25.5in Midnight Bronze

CMMG Dissent Mk4 5.56mm 16.1in Upper Group 1-7 Twist 1/2 X 28 TPI .750in 25.5in Coyote Tan

CMMG UPPER GRP RES MK4 5.56X45 NAT 16.1 TUNG CB2D9AE9 CMM

CMMG UPPER GRP RES MK4 5.56X45 NATO 16.1 TAN 790B3D81 CMM

Fortis Manufacturing Fortis Billet Upper Receiver Black

Fortis Manufacturing Billet Dust Cover Carbon Fiber Red Red

Fortis Manufacturing Billet Dust Cover Carbon Fiber Blue Blue

Fortis Manufacturing Billet Upper Receiver Stripped Black

1791 Industries LiteRaider Magnite Lightweight Stripped Upper Receiver AR-15 FDE

1791 Industries LiteRaider Magnite Lightweight Stripped Upper Receiver AR-15 Black

CMMG DISSENT Mk4 5.56x45mm NATO 6.5in Upper Receiver 1-7 Twist .750in 1/2 X 28 TPI Tungsten

UPPER GRP DIS MK4 5.56MM 6.5 BLK

CMMG DISSENT Mk4 5.56x45mm NATO 10.5in Upper Receiver 1-7 Twist .750in 1/2 X 28 TPI Midnight Bronze

CMMG DISSENT Mk4 5.56x45mm NATO 10.5in Upper Receiver 1-7 Twist .750in 1/2 X 28 TPI Coyote Tan

CMMG Mk4 5.56X45mm NATO Banshee Upper Group Receiver 10.5in 1-7 Twist 1/2 X 28 TPI 18.8in Tungsten

CMMG Mk4 5.56X45mm NATO Banshee Upper Group Receiver 10.5in 1-7 Twist 1/2 X 28 TPI 18.8in Midnight Bronze