Complete uppers are helpful for those that are looking to swap to a new caliber on their AR-15 or AR-10 quickly. Own a 5.56NATO AR-15? Buy a .300 Blackout complete upper below and attach to your existing lower. Same with AR-10. Already have a .308 Win AR? Buy a 6.5 Creedmoor upper below and start blasting.

A complete upper is exactly as it sounds. Complete. That means it comes with the upper, barrel, muzzle device, handguard, and most times bolt carrier group.  There are many different calibers that allow for quick swap onto your existing AR-15/AR-10 lower. Check out all of our complete uppers below and start your next build or upgrade your existing AR.

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  • AR-10 Complete Upper

    AR-10 Complete Upper

    7 products
  • AR-15 Complete Uppers

    AR-15 Complete Uppers

    33 products
  • AR-9 Complete Uppers

    AR-9 Complete Uppers

    3 products
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    BCA-15 .300 Blackout 16″ Stainless Black Nitride Fluted Heavy Barrel Complete Upper w/BCG Side Charger

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    This BCA AR-15 complete 300 Blackout rifle length upper has a 16″ bear claw fluted heavy barrel with a 416R stainless steel with black nitride finish, and features a 1:8…

    $399.99

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    BCA AR-15 6.5 Grendel Complete Upper w/BCG 18in Stainless Heavy Barrel 1:8 Twist

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    BCA AR-15 6.5 Grendel Complete Upper w/BCG 18in Stainless Heavy Barrel 1:8 Twist

    $319.99

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    BCA AR-15 .22 Magnum (WMR) 20in Complete Upper w/BCG, Buffer, Spring

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    BC-22 | .22 Magnum (WMR) Branded Right Side Charging Upper | 20″ Black Nitride Heavy Barrel | 1:16 Twist | Blowback Gas System | 15″ MLOK

    $319.99

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    BCA AR-10 .243 WIN Side Charger Complete Upper w/BCG 24in 416R SS Light-Weight Barrel

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    This BCA AR-10 complete .243 rifle length upper has a 24″ 416R Stainless Steel Light-weight barrel, and features a 1:8 twist rate, with a rifle length gas system. This upper…

    $429.99

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    BCA AR-10 6.5 Creedmoor Side Charging Handle 22in 416R SS w/BCG Complete Upper

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    BCA 6.5CR 22″ SL RSC CUPPER

    $339.99

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    BCA AR-10 Complete Upper w/BCG .243 Winchester Forged 20in. Heavy Barrel 15in. MLOK

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    BCA AR-10 Complete Upper w/BCG .243 Winchester Forged 20in. Heavy Barrel 15in. MLOK

    $379.99

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    Complete AR-15 Upper Receiver w/BCG .350 Legend, 20″ Parkerized Heavy Barrel, 1:16 Twist, Carbine Length Gas System, 15″ MLOK Rail|Side Charging Upper (Gen 2)|New MLOK

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    This BCA AR-15 complete 350 Legend rifle length upper has a 20″ heavy barrel with a parkerized finish, and features a 1:16 twist rate, with a carbine length gas system….

    $399.99

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    BCA AR-15 .22ARC Complete Upper 24in 416R SS Heavy Barrel w/BCG, Charging Handle MLOK

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    BCA AR-15 .22ARC Complete Upper 24in 416R SS Heavy Barrel w/BCG, Charging Handle MLOK

    $399.99

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    BCA AR-15 .22ARC Side Charger Complete Upper 18in 416R SS Heavy Barrel w/BCG, Charging Handle

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    BCA AR-15 .22ARC Side Charger Complete Upper 18in 416R SS Heavy Barrel w/BCG, Charging Handle

    $399.99

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    BCA AR-15 .22 ARC Side Charger Complete Upper 20in 416R SS Heavy Barrel w/BCG, Charging Handle MLOK

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    BCA AR-15 .22 ARC Side Charger Complete Upper 20in 416R SS Heavy Barrel w/BCG, Charging Handle MLOK

    $399.99

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    BCA AR-9 9MM Luger Bufferless Complete Upper 5in w/BCG MLOK

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    This BCA AR-15 complete 9MM pistol length bufferless (Patent Pending) upper has a 5″ M4 barrel with a parkerized finish, and features a 1:10 twist rate, with a blow back…

    $329.99

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    BCA Complete AR-15 Upper w/BCG .22 LR Right Side Charging Upper | 16″ Black Nitride Heavy Barrel | 1:16 Twist | Blowback Gas System | 15″ MLOK

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    BCA Complete AR-15 Upper w/BCG .22 LR Right Side Charging Upper | 16″ Black Nitride Heavy Barrel | 1:16 Twist | Blowback Gas System | 15″ MLOK

    $329.99

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    BCA AR-10 Complete Upper w/BCG 22-250 Right Side Charging Upper | 24″ Black Nitride Light-weight Barrel | 1:14 Twist | Rifle Length Gas System | 15″ MLOK

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    BCA AR-10 Complete Upper w/BCG 22-250 Right Side Charging Upper | 24″ Black Nitride Light-weight Barrel | 1:14 Twist | Rifle Length Gas System | 15″ MLOK

    $369.99

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    BCA AR-15 Complete Upper w/BCG .400 Legend Upper | 18″ Parkerized Heavy Barrel | 1:16 Twist | Carbine Length Gas System | Talon 15” MLOK Split Rail

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    .400 Legend Upper | 18″ Parkerized Heavy Barrel | 1:16 Twist | Carbine Length Gas System | Talon 15” MLOK Split Rail

    $339.99

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    BCA AR-15 5.56 NATO Bolt Action Complete Upper w/BCG, Charging Handle

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    BCA AR-15 5.56 NATO Bolt Action Complete Upper w/BCG, Charging Handle

    $399.99

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    BCA AR-15 Complete Upper .22LR Side Charger 416R SS 10.5in Barrel w/BCG Charging Handle

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    BCA AR-15 Complete Upper .22LR Side Charger 416R SS 10.5in Barrel w/BCG Charging Handle

    $319.99

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    BCA AR-15 Complete Upper .22LR Side Charger 7.5in Barrel MLOK w/BCG and Charging Handle

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    BCA AR-15 Complete Upper .22LR Side Charger 7.5in Barrel MLOK w/BCG and Charging Handle

    $299.99
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    BCA AR-15 .22 ARC Complete Upper w/BCG 20in Heavy Barrel 1:7 Twist 15in MLOK

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    BCA AR-15 .22 ARC Complete Upper w/BCG 20in Heavy Barrel 1:7 Twist 15in MLOK

    $399.99

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    BCA AR-15 Pistol .300 Blackout Complete Upper w/BCG 4.5in Heavy Barrel MLOK

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    BCA AR-15 .300 Blackout Complete Upper w/BCG 4.5in Heavy Barrel MLOK

    $349.99

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    BCA AR-15 Pistol 5.56 NATO Complete Upper w/BCG 4.5in Heavy Barrel MLOK

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    BCA AR-15 Pistol 5.56 NATO Complete Upper w/BCG 4.5in Heavy Barrel MLOK

    $349.99

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    BC-10 | 6.5 Creedmoor Forged Upper | 24″ Black Nitride Light-weight Barrel | 1:8 Twist | Rifle Length Gas System | 15″ MLOK Split Rail | with BCG & Charging Handle

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    This BCA AR-10 Complete Upper has a 24″ Black Nitride light-weight barrel, and features a 1:8 Twist Rate, a Rifle length gas system. This upper features our lightweight barrel profile…

    $399.99

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    BCA AR-15 .300 Blackout Complete Upper w/BCG 16in SS Black Nitride 1:8 Twist

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    BCA AR-15 .300 Blackout Complete Upper w/BCG 16in SS Black Nitride 1:8 Twist

    $339.99

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    BCA AR-10 .308 Win Forged Complete Upper w/BCG 24in 416R SS Light-Weight Barrel 1:10 Twist

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    BCA AR-10 .308 Win Forged Complete Upper w/BCG 24in 416R SS Light-Weight Barrel 1:10 Twist

    $399.99

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    BCA AR-15 7.62×39 Side Charger Complete Upper w/BCG 16in 416R Stainless Bear Claw Fluted

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    BCA AR-15 7.62×39 Side Charger Complete Upper w/BCG 16in 416R Stainless Bear Claw Fluted

    $349.99