12% Off Optics: GLASSBREAK12

AR Complete Upper Receivers

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BG 7.5" 5.56 Upper Receiver - FDE | A2 | 7" M-LOK | Without BCG & CH

MSRP: $403.95

SALE PRICE: $205.95

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BG Complete 7.5" 5.56 Upper Receiver - FDE | A2 | 7" M-LOK | With BCG & CH

MSRP: $454.95

SALE PRICE: $277.95

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RTB 14.5" 5.56 Upper Receiver (16" OAL) - Black | 13.5" M-LOK | Without BCG & CH

MSRP: $464.95

SALE PRICE: $258.95

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RTB Complete 14.5" 5.56 Upper Receiver (16" OAL) - Black | 13.5" M-LOK | Mid Length | With BCG & CH

MSRP: $520.95

SALE PRICE: $351.95

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BG 14.5" 5.56 Upper Receiver (16" OAL) | 12" M-LOK | Without BCG & CH

MSRP: $450.95

SALE PRICE: $233.95

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BG Complete 14.5" 5.56 Upper Receiver (16" OAL) | 12" M-LOK | With BCG & CH

MSRP: $448.95

SALE PRICE: $269.95

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Spikes Tactical - Forged M4 Flat Top Upper (Multi Cal)

MSRP:

MSRP: $115.00

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Ghost Firearms Elite - 16" Upper 5.56 NATO Barrel w/ 14" M-LOK Rail - OD Green | Without BCG & CH

MSRP:

MSRP: $348.95

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Aero Precision M5 (.308) Stripped Upper Receiver - FDE Cerakote

MSRP:

MSRP: $164.99

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Grid Defense Billet Upper - 20" .308 Winchester Barrel w/ 15" M-LOK Rail - FDE | Without BCG & CH

MSRP: $589.00

SALE PRICE: $449.00

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Grid Defense Billet Upper - 20" .308 Winchester Barrel w/ 15" M-LOK Rail - Black | Without BCG & CH

MSRP: $589.00

SALE PRICE: $449.00

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Grid Defense Billet Upper - 18" .308 Winchester Barrel w/ 15" M-LOK Rail - FDE | Without BCG & CH

MSRP: $579.00

SALE PRICE: $439.00

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Grid Defense Billet Upper - 18" .308 Winchester Barrel w/ 15" M-LOK Rail - Black | Without BCG & CH

MSRP: $579.00

SALE PRICE: $439.00

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Grid Defense Billet Upper - 16" .308 Winchester Barrel w/ 15" M-LOK Rail - Tungsten | Without BCG & CH

MSRP: $569.00

SALE PRICE: $429.00

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Grid Defense Billet Upper - 16" .308 Winchester Barrel w/ 15" M-LOK Rail - OD Green | Without BCG & CH

MSRP: $569.00

SALE PRICE: $429.00

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Grid Defense Billet Upper - 16" .308 Winchester Barrel w/ 15" M-LOK Rail - FDE | Without BCG & CH

MSRP: $569.00

SALE PRICE: $429.00

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RTB Builders Set - 15" M-LOK | BB/FDE Tiger Stripe

MSRP: $609.95

SALE PRICE: $399.95

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RTB Builders Set - 15" M-LOK | BB Battle Worn

MSRP: $509.95

SALE PRICE: $349.95

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BG 7.5" 5.56 Upper Receiver - Burnt Bronze | A2 | 7" M-LOK | Without BCG & CH

MSRP: $402.95

SALE PRICE: $204.95

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BG Complete 7.5" 5.56 Upper Receiver - Burnt Bronze | A2 | 7" M-LOK | With BCG & CH

MSRP: $453.95

SALE PRICE: $277.95

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RTB 16" 5.56 Upper Receiver - Burnt Bronze | A2 | 13.5" M-LOK | Without BCG & CH

MSRP: $414.95

SALE PRICE: $314.95

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RTB Complete 16" 5.56 Upper Receiver - Burnt Bronze | A2 | 13.5" M-LOK | With BCG & CH

MSRP: $514.95

SALE PRICE: $414.95

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RTB 16" 5.56 Upper Receiver - Burnt Bronze | A2 | 12" M-LOK | Without BCG & CH

MSRP: $409.95

SALE PRICE: $309.95

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RTB Complete 16" 5.56 Upper Receiver - Burnt Bronze | A2 | 12" M-LOK | With BCG & CH

MSRP: $509.95

SALE PRICE: $409.95

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Aero Precision EPC-9 - Enhanced Upper Receiver w/ Last Round Bolt Hold Open - Anodized Black

MSRP:

MSRP: $199.99

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Spike's Tactical Stripped Lower / Upper Set - Spider Logo - Grey

MSRP: $260.00

SALE PRICE: $234.00

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Aero Precision M4E1 Threaded Stripped Upper Receiver - Anodized Black

MSRP:

MSRP: $114.99

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Anderson M4 16" Stripped Upper Receiver Kit, 5.56 NATO / .223 Rem

MSRP: $269.95

SALE PRICE: $264.95

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Yankee Hill Flat Top Upper Receiver, Stripped

MSRP:

MSRP: $95.95

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Spike's Tactical Billet Upper- Gen II (Mil Spec Barrel Nut)

MSRP:

MSRP: $270.00

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Nordic Components NC15 Extruded Stripped Upper AR15 Aluminum - Black

MSRP: $110.30

SALE PRICE: $102.35

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Ghost Firearms Elite - 16" Upper 5.56 NATO Barrel w/ 14" M-LOK Rail - Tungsten Gray | Without BCG & CH

MSRP:

MSRP: $348.95

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Ghost Firearms Elite - 16" Upper 5.56 NATO Barrel w/ 14" M-LOK Rail - FDE | Without BCG & CH

MSRP:

MSRP: $348.95

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Ghost Firearms Elite - 16" Upper 5.56 NATO Barrel w/ 14" M-LOK Rail - Blue Titanium | Without BCG & CH

MSRP:

MSRP: $348.95

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Ghost Firearms Elite - 16" Upper 5.56 NATO Barrel w/ 14" M-LOK Rail - Burnt Bronze | Without BCG & CH

MSRP:

MSRP: $348.95

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Ghost Firearms Elite Upper - 16" 300 Blackout Barrel w/ 14" M-LOK Rail - Tungsten Gray | Without BCG & CH

MSRP:

MSRP: $348.95

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Ghost Firearms Elite Upper - 16" 300 Blackout Barrel w/ 14" M-LOK Rail - OD Green | Without BCG & CH

MSRP:

MSRP: $348.95

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Ghost Firearms Elite Upper - 16" 300 Blackout Barrel w/ 14" M-LOK Rail - FDE | Without BCG & CH

MSRP:

MSRP: $348.95

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Ghost Firearms Elite Upper - 16" 300 Blackout Barrel w/ 14" M-LOK Rail - Blue Titanium | Without BCG & CH

MSRP:

MSRP: $348.95

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Ghost Firearms Elite Upper - 16" 300 Blackout Barrel w/ 14" M-LOK Rail - Burnt Bronze | Without BCG & CH

MSRP:

MSRP: $348.95

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Ghost Firearms Elite Upper - 16" 300 Blackout Barrel w/ 14" M-LOK Rail - Black | Without BCG & CH

MSRP:

MSRP: $348.95

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Aero Precision Stripped AR-15 Upper Receiver

MSRP:

MSRP: $109.99

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Aero Precision Assembled AR-15 Upper Receiver with Port Door and Forward Assist

MSRP:

MSRP: $109.99

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RTB 11" 9mm Upper Receiver - BLK | A2 | 10" M-LOK HG | Without BCG & CH

MSRP: $433.95

SALE PRICE: $206.95

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RTB Complete 11" 9mm Upper Receiver - BLK | A2 | 10" M-LOK HG | With BCG & CH

MSRP: $488.95

SALE PRICE: $305.95

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11" 9mm Upper Receiver - BLK | A2 | 9.25" M-LOK OCTO Rail | Without BCG & CH

MSRP: $427.95

SALE PRICE: $196.95

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Complete 11" 9mm Upper Receiver - BLK | A2 | 9.25" M-LOK OCTO Rail | With BCG & CH

MSRP: $483.95

SALE PRICE: $269.06

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BG Builders Set - 15" M-LOK | FDE | TM Serial Engraving

MSRP: $312.95

SALE PRICE: $203.95

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RTB Builders Set - 15" M-LOK | FDE

MSRP: $345.95

SALE PRICE: $213.95

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Pistol Build Kit - 9MM | 4.5" Complete Upper Receiver w/A2| AA Stabilizer Fin | TS LPK

MSRP: $499.90

SALE PRICE: $299.95

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RTB 8.3" 9mm REBEL Upper Receiver - ODG | Flash Can | Carbine HG | Without BCG & CH

MSRP: $437.95

SALE PRICE: $201.95

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RTB Complete 8.3" 9mm REBEL Upper Receiver - ODG | Flash Can | Carbine HG | With BCG & CH

MSRP: $446.95

SALE PRICE: $263.95

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Complete 8.3" 9mm Upper Receiver - Black | FLASH CAN | 9" Tube Handguard | With BCG & CH

MSRP: $519.95

SALE PRICE: $236.95

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STAG 15 Retro 20" Upper With Chrome Phosphate Barrel In 5.56mm

MSRP: $649.99

SALE PRICE: $583.95

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BG 4.5" 9mm Upper Receiver - Black | FLASH CAN | 4" M-LOK | Without BCG & CH

MSRP: $366.95

SALE PRICE: $146.95

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RTB Complete 5.5" 9mm Upper Receiver - Black | FLASH CAN | 7" M-LOK | With BCG & CH

MSRP: $479.95

SALE PRICE: $279.95

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The most important part to consider when building any AR15 rifle is the complete upper receiver. The upper receiver assembly contains all of the essential parts of the rifle including the barrel, bolt carrier and firing pin, among others. AR uppers help you customize a rifle for any application whether it is military or civilian. For instance, an A3 upper receiver is flat-topped to accept a range of scopes for hunters along with the A4 upper receiver they both use a gas block or a standard front sight.

For the widest selection of complete upper receivers with a tight fit and no wobble, check out the options available from Right to Bear Arms and Supply. You can choose from mil-spec upper receivers which are forged uppers. In addition, we have billet upper, M4 flat-top upper, AR15 striped upper or Spikes upper. Two popular models are the Aero Precision with forward assist & ejection port door and the BCM M4 with laser T-marks.