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
9 products -
AR-15 Complete Uppers
31 products -
AR-9 Complete Uppers
3 products -
AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA-15 .300 Blackout 16″ Stainless Black Nitride Fluted Heavy Barrel Complete Upper w/BCG Side Charger
$399.99This 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…
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AR AK Parts, AR Upper Parts, AR-10 Complete Upper, Complete Uppers, Gun PartsBCA AR-10 .243 WIN Side Charger Complete Upper w/BCG 24in 416R SS Light-Weight Barrel
$429.99This 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…
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AR AK Parts, AR Upper Parts, AR-10 Complete Upper, Complete Uppers, Gun PartsBCA AR-10 .308 WIN Complete Upper 20in 416R SS Heavy Barrel w/BCG, Charging Handle
$349.99BC-10 | .308 Right Side Charging Upper | 20″ 416R SS Heavy Barrel | 1:10 Twist | Rifle Length Gas System | 15″ MLOK Split Rail | with BCG &…
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AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 .300 Blackout Side Charger Complete Upper 7.5in Barrel w/BCG, Charging Handle
$259.99BCA AR-15 .300 Blackout Side Charger Complete Upper 7.5in Barrel w/BCG, Charging Handle
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AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 .300 Blackout Side Charger Complete Upper 16in Melonite w/BCG, Charging Handle
$269.99BCA AR-15 .300 Blackout Side Charger Complete Upper 16in Melonite w/BCG, Charging Handle
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AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 Complete Upper 6.8 SPC 16in M4 Barrel 1:10 Twist MLOK w/BCG, CH
$299.99BCA AR-15 Complete Upper 6.8 SPC 16in M4 Barrel 1:10 Twist MLOK w/BCG, CH
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AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 Complete Upper 6.5 Grendel Side Charger 20in Stainless Barrel 1:7 Twist MLOK w/BCG, CH, Buffer, Buffer Spring
$309.99BCA AR-15 Complete Upper 6.5 Grendel Side Charger 20in Stainless Barrel 1:7 Twist MLOK w/BCG, CH, Buffer, Buffer Spring
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AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 Complete Upper .22 ARC 24in Stainless Barrel 1:7 Twist MLOK w/BCG, CH, Buffer, Buffer Spring
$319.99BCA AR-15 Complete Upper .22 ARC 24in Stainless Barrel 1:7 Twist MLOK w/BCG, CH, Buffer, Buffer Spring
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AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 .17 HMR Complete Upper 16in MLOK w/BCG, CH, Buffer, Buffer Spring
$279.99BCA AR-15 .17 HMR Complete Upper 16in MLOK w/BCG, CH, Buffer, Buffer Spring
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AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 .350 Legend Side Charger Complete Upper 20in Heavy Barrel MLOK w/BCG, CH
$289.99BC-15 | .350 Legend Right Side Charging Upper | 20″ Parkerized Heavy Barrel | 1:16 Twist | Carbine Length Gas System | 15″ MLOK Split Rail| with BCG & Charging…
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AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 .450 Bushmaster Complete Upper 18in MLOK w/BCG, CH
$289.99BCA AR-15 .450 Bushmaster Complete Upper 18in MLOK w/BCG, CH
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AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBC-15 | 6.8 SPC II Right Side Charging Upper | 10.5” Parkerized M4 Barrel | 1:10 Twist | Carbine Length Gas System | Talon 10” MLOK Split Rail | with BCG & Charging Handle
$319.99BC-15 | 6.8 SPC II Right Side Charging Upper | 10.5” Parkerized M4 Barrel | 1:10 Twist | Carbine Length Gas System | Talon 10” MLOK Split Rail | with…
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AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBC-15 | .450 Bushmaster Upper | 10.5” Parkerized Heavy Barrel | 1:24 Twist | Pistol Length Gas System | 9.5” MLOK | with BCG & Charging Handle
$279.99BC-15 | .450 Bushmaster Upper | 10.5” Parkerized Heavy Barrel | 1:24 Twist | Pistol Length Gas System | 9.5” MLOK | with BCG & Charging Handle
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AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBC-15 | 5.56 NATO Forged Upper | 16″ Melonite Government – 0.75 | 1:8 Twist | 4150 Carbine Length Gas System | MLOK Split Rail
$289.95BC-15 | 5.56 NATO Forged Upper | 16″ Melonite Government – 0.75 | 1:8 Twist | 4150 Carbine Length Gas System | MLOK Split Rail
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AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBC-15 | 5.56 NATO Forged Upper | 18″ Melonited Stainless Heavy Barrel – 0.75 | 1:8 Twist | Bear Claw Flutes | Stainless 416R Mid Length Length Gas System | MLOK Split Rail
$319.95BC-15 | 5.56 NATO Forged Upper | 18″ Melonited Stainless Heavy Barrel – 0.75 | 1:8 Twist | Bear Claw Flutes | Stainless 416R Mid Length Length Gas System |…
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AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBC-15 | 6mm Arc Upper | 20” 416R SS Straight Fluted Heavy Barrel | Rifle Length Gas System | 1:8 Twist | Talon 15” MLOK Split Rail | with BCG & Charging Handle
$339.95This BCA AR-15 complete 6mm Arc upper has a 20″ heavy contour barrel with a 416R stainless finish with straight flutes, and features a 1:8 twist rate, with a rifle…
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AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBC-15 | 12.7×42 Upper| 16″ Parkerized Heavy Barrel | 1:20 Twist | Carbine Length Gas System | Talon 15” MLOK Split Rail | with BCG & Charging Handle
$299.99This Bear Creek Arsenal AR-15 12.7×42 Complete upper has a 16″ parkerized heavy barrel, and features a 1:20 twist, with a carbine length gas system. This 12.7×42 AR-15 also includes…
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AR AK Parts, AR Upper Parts, AR-10 Complete Upper, Complete Uppers, Gun PartsBC-10 | .277 Fury Forged Upper | 16″ Parkerized Mid-Weight Barrel | 1:7 Twist | Mid-Length Gas System | 15″ MLOK Split Rail
$379.99This BCA AR-10 complete .277 Fury rifle length upper has a 16″ Parkerized Mid-weight barrel and features a 1:7 twist rate with a mid-length gas system. It includes the new…
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AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBC-15 | 5.56 NATO Right Side Charging Upper | 10.5″ 416R SS M4 Barrel | 1:8 Twist | Carbine Length Gas System | 9.5″ MLOK Split Rail| with BCG & Charging Handle
$279.99This BCA AR-15 complete 5.56 Nato pistol length upper has a 10.5″ M4 contour barrel with a 416R Stainless Steel finish, and features a 1:8 twist rate, with a carbine…
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AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBC-15 | .410 Shotgun Right Side Charging Upper | 20″ Parkerized Unthreaded Barrel with Full Choke | Talon 15” MLOK Split Rail | with BCG & Charging Handle & (1) 3 Rd Magazine
$349.99The Bear Creek Arsenal .410 shotgun complete upper has been thoroughly tested for reliability with a wide variety of ammunition and includes many enhanced features. Comes with (1) 5 Round…
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AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 Pistol Complete Upper .338 ARC 10.5in Barrel w/BCG, Handle
$309.99BCA AR-15 Pistol Complete Upper .338 ARC 10.5in Barrel w/BCG, Handle
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AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBC-15 | 5.56 NATO Right Side Charging Upper | 16″ 416R SS M4 Barrel | 1:8 Twist | Carbine Length Gas System | 15″ MLOK Split Rail| with BCG & Charging Handle
$309.99BC-15 | 5.56 NATO Right Side Charging Upper | 16″ 416R SS M4 Barrel | 1:8 Twist | Carbine Length Gas System | 15″ MLOK Split Rail| with BCG &…
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AR AK Parts, AR Upper Parts, AR-10 Complete Upper, Complete Uppers, Gun PartsBC-10 | .308 Forged Upper | 20″ 416R SS Black Nitride Straight Fluted Heavy Barrel | 1:10 Twist | Rifle Length Gas System | 15″ MLOK Split Rail | with BCG & Charging Handle
$429.99This BCA AR-10 complete .308 rifle length upper has a 20″ 416R stainless straight fluted Heavy barrel with a black nitride finish, and features a 1:10 twist rate, with a…
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AR AK Parts, AR Upper Parts, AR-10 Complete Upper, Complete Uppers, Gun PartsBC-10 | 6.5 Creedmoor Forged Upper | 20” Black Nitride Heavy Barrel | 1:8 Twist | Rifle Length Gas System | 15” MLOK Split Rail | with BCG & Charging Handle
$349.99This BCA AR-10 Complete Upper has a 20″ heavy barrel with a black nitride finish, and features a 1:8 Twist Rate, a Rifle length gas system. It includes the new…
