Shop 4,464 Deals on Upper Receivers

Quarter Circle 10 Side Charging Complete 45 ACP Upper Receiver Assembly 16in Barrel Black

Quarter Circle 10 45 ACP Complete Upper Receiver w/ PMUR 7.5in Barel .578-28 7.5in HG FH Black

EDEMO R&D Precision PW9 9mm Gen 1 Bufferless Upper Kit Black EDEMO3

USED Bushmaster QRC 5.56 NATO/.223 Rem Upper Receiver 25in Length16in SBN Barrel 1/8 Twist Rate C.A.R. Style/A4 A2 Birdcage Black EDEMO2

No Brand BC-15 .458 SOCOM Right Charging ODG Cerakote Upper Parkerized 16" Heavy Barrel 1:14 Twist Carbine Length

Bear Creek Arsenal BC15 5.56 NATO 16in Right Upper Receiver M4 Carbine 1-8 1/2x28 Flash Hide Nitride Tungsten

Bear Creek Arsenal BC-15 .223 Wylde 18in Bolt Action Style Upper Receiver Straight Fluted Heavy 1-8 5/16x24 Flash Hider 416R

Bear Creek Arsenal BC-15 5.56 NATO 10.5in Bolt Action Style Upper Receiver M4 1-8 1/2x28 Flash Hider 416R

Bear Creek Arsenal BC-15 .350 Legend 16in Bolt Action Style Upper Receiver M4 1-16 1/2x28 Flash Hider 416R

Bear Creek Arsenal BC-15 .458 SOCOM 16in Bolt Action Style Upper Receiver Heavy 1-14 5/8x32 Flash Hider Parkerized

Bear Creek Arsenal BC-15 5.56 NATO 7.5in Bolt Action Style Upper Receiver M4 Barrel 1-7 Twist 1/2x28 Flash Hider Parkerized

CBC Industries Unassembled AR-15 Pistol Kit 10.5 in 5.56 Nato Black

EDEMO Daniel Defense Big Hole Upper Receiver w/ Feed Ramps EDEMO1

Aagil Arms Complete AR-15 5.56 NATO Upper Assembly 16in Barrel Length Carbine 1-7 Twist w/ 15in M-Lok Anodized Black Medium

USED Bushmaster V-Match Complete Upper Assembly 5.56mm NATO/.223 Remington 16 Inch Heavy-Profile Match Grade Chrome Lined Barrel T-Marked Flat Top

DEMO Radical Firearms Upper Assembly 16 inch 5.56 SOCOM mid 15 inch FCR A2 FH w/o BCG and CH Black

"The UnderTaker" Complete AR10 Upper- 358 Win, 12.5" Barrel, 9.8" Mlok, Mid Gas Length

ZEV Technologies MEGA AR15 MML Billet Stripped Upper Receiver w/ 16'' M-LOK Handguard Black

Ghost Firearms Complete Upper Receiver Pistol Lower Parts Kit 5.56mm 7.5in Pistol 4150 M4 Barrel 1-7 Twist 9in M-LOK Free Float Hand Guard Flash Can

Ghost Firearms Complete Upper Receiver Pistol Lower Parts Kit 9mm 7.5in Pistol Length 4150 Chrome Moly Steel Barrel 1-10 Twist 7in M-LOK Rail A2 Flash

Ghost Firearms Complete Upper Receiver Pistol Lower Parts Kit 9mm 7.5in Pistol 4150 Chrome Moly Steel Barrel 1-10 Twist 7in M-LOK Rail A2 Flash Hider

EDEMO Ghost Firearms Elite Complete Upper Receiver 9mm 9x19 Para 7.5 inch 4150 Light HBAR Barrel 1-10 Twist 7 inch M-LOK Free Float Hand Guard A2

Ghost Firearms Vital Complete Upper Reciever 7.62x39 16 inch Carbine Length 4150 Light HBAR Barrel 1-10 Twist 11 inch M-LOK Free Float Hand Guard A2

Ghost Firearms Upper Receiver Rifle Lower Parts Kit 5.56mm 16in Carbine 4150 Chrome Moly Steel Barrel 1-7 Twist 14in M-LOK Free Float Hand Guard A2