Brigade Manufacturing AR Complete Upper Receiver Forged 5.56 5 inch Barrel Tungsten Charging Handle 5 inch Rail A2 Flash Hider U5615030

Daniel Defense Mk18 5.56 Upper Receiver Group Complete - Mk18 10.3" Upper Receiver 5.56 1-7 Govt Bla

The Daniel Defense MK18 Upper Receiver Group features the railed forend Daniel Defense currently provides to USSOCOM and a 10.3" Cold Hammer Forged Barrel. The MK18 Rail Interface System (RIS II) features the Bolt-Up System has been rigorously... ... more

Aero Precision M4e1 Assembled Upper Receiver 5.56 Mid-Length - M4e1 5.56 Nato Assem Uppr Rcvr M4 14.

Aero Precision's M4E1 5.56mm Mid-Length Upper Receiver comes fully assembled, lacking only a bolt/carrier group and charging handle - the two components most often replaced by customizers. "Mid-Length" refers to the gas tube, which is longer than... ... more

Aero Precision M4e1 Assembled Upper Receiver 5.56 Mid-Length - M4e1 5.56 Nato Assem Uppr Rcvr M4 16"

Aero Precision's M4E1 5.56mm Mid-Length Upper Receiver comes fully assembled, lacking only a bolt/carrier group and charging handle - the two components most often replaced by customizers. "Mid-Length" refers to the gas tube, which is longer than... ... more

Faxon Firearms ARAK-21 16in 5.56 Complete Upper URSSB556

Faxon Firearms ARAK-21 16in 5.56 Complete Upper URSSB556. Faxon Firearms designed these AR15 Upper Receivers with an ambidextrous charging handle to suit both left and right-handed shooters. This Faxon Firearms ARAK-21 Aluminum Upper Receiver... ... more

Faxon Firearms ARAK-21 Complete Upper Receiver 7.62x39 15 inch Aluminum Handguard 16 inch Taper Barrel Gen 2 BCG A2 Flash Hider Black FX916U URSSB762

Faxon Firearms ARAK-21 Complete Upper Receiver 7.62x39 15 inch Aluminum Handguard 16 inch Taper Barrel Gen 2 BCG A2 Flash Hider Black FX916U URSSB762. Faxon Firearms designed these AR15 Upper Receivers with an ambidextrous charging handle to suit... ... more

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EQ-15 HG Gen 2 Anodized Black APAR640251Q6

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EQ-15 HG Gen 2 Anodized Black APAR640251Q6. This is a streamlined design that only needs eight screws to mount a free-floating handguard making these AR15 Upper Receivers a more... ... more

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EM-15 HG Gen 2 FDE Cerakote APAR640252M6

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EM-15 HG Gen 2 FDE Cerakote APAR640252M6. This is a streamlined design that only needs eight screws to mount a free-floating handguard making these AR15 Upper Receivers a more... ... more

Radical Firearms Complete Upper Assembly 16 inch 5.56 SOCOM mid 15 inch MHR A2 Flash Hider w/BCG and CH Black CFU16-5.56SOC-15MHR

Radical Firearms Complete Upper Assembly 16 inch 5.56 SOCOM mid 15 inch MHR A2 Flash Hider w/BCG and CH Black CFU16-5.56SOC-15MHR. 56mm is a complete MIL-STD upper ready to drop on any MIL-STD lower Receiver. Perfect for the novice or advanced... ... more

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EM-15 HG Gen 2 Anodized Black APAR640251M6

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EM-15 HG Gen 2 Anodized Black APAR640251M6. This is a streamlined design that only needs eight screws to mount a free-floating handguard making these AR15 Upper Receivers a more... ... more

Aero Precision Complete Upper Receiver M4E1 10.5in 5.56 Barrel w/ FSB EM-7 HG Gen 2 FDE Cerakote APAR640212M3

Aero Precision Complete Upper Receiver M4E1 10.5in 5.56 Barrel w/ FSB EM-7 HG Gen 2 FDE Cerakote APAR640212M3. Key features include the addition of quick disconnect sling sockets enhanced milling design for grip and visual appeal and a new profile... ... more

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EQ-12 HG Gen 2 Anodized Black APAR640231Q6

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EQ-12 HG Gen 2 Anodized Black APAR640231Q6. This is a streamlined design that only needs eight screws to mount a free-floating handguard making these AR15 Upper Receivers a more... ... more

Aero Precision Complete Upper Receiver M4E1 10.5in 5.56 Barrel w/ FSB EQ-7 HG Gen 2 FDE Cerakote APAR640212Q3

Aero Precision Complete Upper Receiver M4E1 10.5in 5.56 Barrel w/ FSB EQ-7 HG Gen 2 FDE Cerakote APAR640212Q3. Key features include the addition of quick disconnect sling sockets enhanced milling design for grip and visual appeal and a new profile... ... more

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EQ-15 Gen 2 HG FDE Cerakote APAR640252Q6

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EQ-15 Gen 2 HG FDE Cerakote APAR640252Q6. This is a streamlined design that only needs eight screws to mount a free-floating handguard making these AR15 Upper Receivers a more... ... more

Aero Precision M4E1 Complete Upper Receiver 5.56 Mid Barrel EM-12 HG No BCG/Charging Handle Anodized Black 14.5in APAR600231M5

Aero Precision M4E1 Complete Upper Receiver 5.56 Mid Barrel EM-12 HG No BCG/Charging Handle Anodized Black 14.5in APAR600231M5. 56 Mid Barrel EM-12 HG. Formulated by using some of the most extremely robust and dependable materials in existence these... ... more

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EM-12 HG Gen 2 FDE Cerakote APAR640232M6

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EM-12 HG Gen 2 FDE Cerakote APAR640232M6. This is a streamlined design that only needs eight screws to mount a free-floating handguard making these AR15 Upper Receivers a more... ... more

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EM-12 HG Gen 2 Anodized Black APAR640231M6

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EM-12 HG Gen 2 Anodized Black APAR640231M6. This is a streamlined design that only needs eight screws to mount a free-floating handguard making these AR15 Upper Receivers a more... ... more

Guntec USA AR-15 5.56 Complete Upper Receiver Combo Kit Black GT-UPPER-KIT

Guntec USA AR-15 5.56 Complete Upper Receiver Combo Kit Black GT-UPPER-KIT. Formulated by using several of the most heavy duty and long lasting substances available these AR15 Upper Receivers from Guntec USA provides you with a product that will... ... more

DoubleStar DS-4 AR-15/M4 Flattop Upper Heavy Match Barrel 16 inch 5.56/.223 1-9 Twist A1 Muzzle Device Black ARBU404

DoubleStar DS-4 AR-15/M4 Flattop Upper Heavy Match Barrel 16 inch 5.56/.223 1-9 Twist A1 Muzzle Device Black ARBU404. 5.56 Nato 1.9 twist M4 Feed Ramps Forged upper Specifications for DoubleStar DS-4 AR-15/M4 Flattop 16" Upper Receiver:... ... more

Aero Precision 5.56x45 Nato Assembled Upper Receiver For Ar-15 - 5.56x45 Nato Assembled Upper Receiv

Aero Precision's AR-15 5.56mm 16" Carbine Upper Receiver closely resembles the military's M4 flattop upper and comes fully assembled. The charging handle and bolt/carrier group are omitted, since AR-15 fans who assemble their own rifles usually... ... more

Aero Precision M4e1 5.56mm Assembled Upper Receiver W/Gen-2 Handguard & Fsb - M4e1 5.56 Assm Uppr Rc

Aero Precision's M4E1 5.56mm 10.5" Carbine Upper Receiver comes fully assembled, lacking only a bolt/carrier group and charging handle - the two most popular components for customization. At its heart is Aero's forged M4E1 receiver that combines the... ... more

Aero Precision M4e1 5.56 Assembled Upper Receiver Carbine W/G2 Handguard - M4e1 5.56 Nato Assem Uppr

Aero Precision's M4E1 5.56mm 16" Carbine Upper Receiver comes fully assembled, minus only the bolt/carrier group and charging handle - the two components any AR-15 fan with even a little urge to customize wants to replace anyway. Aero's M4E1... ... more

American Defense Manufacturing 5.56 12.5 Inch Barrel M-Lok Rail Upper Reciever Midnight Bronze 12.5 in UICCUBRZ12M2MLOK

American Defense Manufacturing 5.56 12.5 Inch Barrel M-Lok Rail Upper Reciever Midnight Bronze 12.5 in UICCUBRZ12M2MLOK. 56 12.5 Inch Barrel M-Lok Rail Upper Reciever: Manufacturer: American Defense Manufacturing Cartridge: 5.56x45mm NATO Barrel... ... more

American Defense Manufacturing 5.56 12.5 Inch Barrel M-Lok Rail Upper Reciever Flat Dark Earth 12.5 in UICCUPFDE12M2MLOK

American Defense Manufacturing 5.56 12.5 Inch Barrel M-Lok Rail Upper Reciever Flat Dark Earth 12.5 in UICCUPFDE12M2MLOK. 56 12.5 Inch Barrel M-Lok Rail Upper Reciever: Manufacturer: American Defense Manufacturing Cartridge: 5.56x45mm NATO Barrel... ... more

American Defense Manufacturing 300 Out 10.5 Inch Barrel M-Lok Rail Upper Reciever Midnight Bronze 10.5 in UICCUBOBRZ10M2MLOK

American Defense Manufacturing 300 Out 10.5 Inch Barrel M-Lok Rail Upper Reciever Midnight Bronze 10.5 in UICCUBOBRZ10M2MLOK. 5 Inch Barrel M-Lok Rail Upper Reciever lives up to its name. American Defense Manufacturing crafted this .300 AAC Blackout... ... more

American Defense Manufacturing 300 Out 10.5 Inch Barrel M-Lok Rail Upper Reciever Flat Dark Earth 10.5 in UICCUBOPFDE10M2MLOK

American Defense Manufacturing 300 Out 10.5 Inch Barrel M-Lok Rail Upper Reciever Flat Dark Earth 10.5 in UICCUBOPFDE10M2MLOK. 5 Inch Barrel M-Lok Rail Upper Reciever lives up to its name. American Defense Manufacturing crafted this .300 AAC... ... more

American Defense Manufacturing 5.56 14.5 Inch Barrel M-Lok Rail Upper Reciever Flat Dark Earth 14.5 in UICCUPFDE14M2MLOK

American Defense Manufacturing 5.56 14.5 Inch Barrel M-Lok Rail Upper Reciever Flat Dark Earth 14.5 in UICCUPFDE14M2MLOK. 56 14.5 Inch Barrel M-Lok Rail Upper Reciever. Built with a Criterion 14.5-inch barrel these AR15 Upper Receivers by American... ... more

American Defense Manufacturing 300 Out 10.5 Inch Barrel M-Lok Rail Upper Reciever Olive Drab 10.5 in UICCUBOOD10M2MLOK

American Defense Manufacturing 300 Out 10.5 Inch Barrel M-Lok Rail Upper Reciever Olive Drab 10.5 in UICCUBOOD10M2MLOK. 5 Inch Barrel M-Lok Rail Upper Reciever lives up to its name. American Defense Manufacturing crafted this .300 AAC Blackout Rifle... ... more

American Defense Manufacturing 5.56 12.5 Inch Barrel M-Lok Rail Upper Reciever Olive Drab 12.5 in UICCUOD12M2MLOK

American Defense Manufacturing 5.56 12.5 Inch Barrel M-Lok Rail Upper Reciever Olive Drab 12.5 in UICCUOD12M2MLOK. 56 12.5 Inch Barrel M-Lok Rail Upper Reciever: Manufacturer: American Defense Manufacturing Cartridge: 5.56x45mm NATO Barrel Length:... ... more

American Defense Manufacturing 5.56 14.5 Inch Barrel M-Lok Rail Upper Reciever Midnight Bronze 14.5 in UICCUBRZ14M2MLOK

American Defense Manufacturing 5.56 14.5 Inch Barrel M-Lok Rail Upper Reciever Midnight Bronze 14.5 in UICCUBRZ14M2MLOK. 56 14.5 Inch Barrel M-Lok Rail Upper Reciever. Built with a Criterion 14.5-inch barrel these AR15 Upper Receivers by American... ... more

American Defense Manufacturing 5.56 12.5 Inch Barrel M-Lok Rail Upper Reciever Black 12.5 in UICCUBLK12M2MLOK

American Defense Manufacturing 5.56 12.5 Inch Barrel M-Lok Rail Upper Reciever Black 12.5 in UICCUBLK12M2MLOK. 56 12.5 Inch Barrel M-Lok Rail Upper Reciever: Manufacturer: American Defense Manufacturing Cartridge: 5.56x45mm NATO Barrel Length: 12.5... ... more

American Defense Manufacturing 5.56 14.5 Inch Barrel M-Lok Rail Upper Reciever Black 14.5 in UICCUBLK14M2MLOK

American Defense Manufacturing 5.56 14.5 Inch Barrel M-Lok Rail Upper Reciever Black 14.5 in UICCUBLK14M2MLOK. 56 14.5 Inch Barrel M-Lok Rail Upper Reciever. Built with a Criterion 14.5-inch barrel these AR15 Upper Receivers by American Defense... ... more

American Defense Manufacturing 5.56 14.5 Inch Barrel M-Lok Rail Upper Reciever Olive Drab 14.5 in UICCUOD14M2MLOK

American Defense Manufacturing 5.56 14.5 Inch Barrel M-Lok Rail Upper Reciever Olive Drab 14.5 in UICCUOD14M2MLOK. 56 14.5 Inch Barrel M-Lok Rail Upper Reciever. Built with a Criterion 14.5-inch barrel these AR15 Upper Receivers by American Defense... ... more

Radical Firearms Complete Upper Assembly AR-15 .300 Blackout 10.5in Barrel 10in HG M-LOK RPR 5/8x24 A2 FH Black CFU10.5-300HBAR-10RPR

Radical Firearms Complete Upper Assembly AR-15 .300 Blackout 10.5in Barrel 10in HG M-LOK RPR 5/8x24 A2 FH Black CFU10.5-300HBAR-10RPR. 5in HBAR profile 300BLK is a complete MIL-STD upper ready to drop on any MIL-STD lower Receiver. Perfect for the... ... more

Stern Defense Ar-15 Sd Mod 5 9mm Upper Receivers M-Lok Complete - Sd Mod 5 9mm Upper Receiver 6in M-

The Stern Defense SD Mod 5 9mm Upper Receivers are unique with handguards that extend beyond the end of the barrels. The 8.5" barreled upper has a 10" M-LOK free float handguard, and the 6" barreled upper has an 8" M-LOK free float handguard. To... ... more

Stern Defense Ar-15 Sd Mod 5 9mm Upper Receivers M-Lok Complete - Sd Mod 5 9mm Upper Receiver 8.5in

The Stern Defense SD Mod 5 9mm Upper Receivers are unique with handguards that extend beyond the end of the barrels. The 8.5" barreled upper has a 10" M-LOK free float handguard, and the 6" barreled upper has an 8" M-LOK free float handguard. To... ... more

Aero Precision Complete Upper Receiver M4E1-T 14.5in 5.56 Carbine Length Barrel 12in M-LOK ATLAS S-ONE Handguard Anodized Black APAR700304M32

Aero Precision Complete Upper Receiver M4E1-T 14.5in 5.56 Carbine Length Barrel 12in M-LOK ATLAS S-ONE Handguard Anodized Black APAR700304M32. The S-ONE line of handguards are designed with size and weight in mind providing the perfect addition to... ... more

Aero Precision Complete Upper Receiver M4E1-T 20in 5.56 Rifle Length Barrel 15in M-LOK ATLAS S-ONE Handguard Cerakote Flat Dark Earth APAR700315M48

Aero Precision Complete Upper Receiver M4E1-T 20in 5.56 Rifle Length Barrel 15in M-LOK ATLAS S-ONE Handguard Cerakote Flat Dark Earth APAR700315M48. Aero Precision built these AR Handguards & Barrels with their ATLAS S-ONE Handguard and 20in 5.56... ... more