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
6 products -
AR-15 Complete Uppers
21 products -
AR-9 Complete Uppers
1 product -
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…
Earn 399 Points -
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…
Earn 429 Points -
AR AK Parts, AR Upper Parts, AR-10 Complete Upper, Complete Uppers, Gun PartsBCA AR-10 6.5 Creedmoor Side Charging Handle 22in 416R SS w/BCG Complete Upper
$339.99BCA 6.5CR 22″ SL RSC CUPPER
Earn 339 Points -
AR AK Parts, AR Upper Parts, AR-10 Complete Upper, Complete Uppers, Gun PartsBCA AR-10 Complete Upper w/BCG .243 Winchester Forged 20in. Heavy Barrel 15in. MLOK
$379.99BCA AR-10 Complete Upper w/BCG .243 Winchester Forged 20in. Heavy Barrel 15in. MLOK
Earn 379 Points -
AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsComplete 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
$399.99This 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….
Earn 399 Points -
AR AK Parts, AR Upper Parts, AR-10 Complete Upper, Complete Uppers, Gun PartsBC-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
$399.99This 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…
Earn 399 Points -
AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 .300 Blackout Complete Upper w/BCG 16in SS Black Nitride 1:8 Twist
$339.99BCA AR-15 .300 Blackout Complete Upper w/BCG 16in SS Black Nitride 1:8 Twist
Earn 339 Points -
AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 7.62×39 Side Charger Complete Upper w/BCG 16in 416R Stainless Bear Claw Fluted
$349.99BCA AR-15 7.62×39 Side Charger Complete Upper w/BCG 16in 416R Stainless Bear Claw Fluted
Earn 349 Points -
AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 5.56 NATO Complete Upper w/BCG 22in 416R SS Flued Heavy Barrel
$369.99BCA AR-15 5.56 NATO Complete Upper w/BCG 22in 416R SS Flued Heavy Barrel
Earn 369 Points -
AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 Pistol 5.56 NATO Complete Upper w/BCG 7.5in Barrel 416R SS M4 Barrel
$299.99BCA AR-15 Pistol 5.56 NATO Complete Upper w/BCG 7.5in Barrel 416R SS M4 Barrel
Earn 299 Points -
AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 .223 Wylde Complete Upper w/BCG 20in Black Nitride Barrel MLOK
$359.99BCA AR-15 .223 Wylde Complete Upper w/BCG 20in Black Nitride Barrel MLOK
Earn 359 Points -
AR AK Parts, AR Upper Parts, AR-10 Complete Upper, Complete Uppers, Gun PartsBCA AR-10 .308 Side Charger Complete Upper w/BCG 20in Black Nitride Heavy Barrel
$399.99BCA AR-10 .308 Side Charger Complete Upper w/BCG 20in Black Nitride Heavy Barrel
Earn 399 Points -
AR AK Parts, AR Upper Parts, AR-9 Complete Uppers, Complete Uppers, Gun PartsBCA AR-9 Complete Upper 9MM Luger Side Charger 10.5in 416R Stainless M4 Barrel
$399.99BCA AR-9 Complete Upper 9MM Luger Side Charger 10.5in 416R Stainless M4 Barrel
Earn 399 Points -
AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsAero Precision M4E1-T Complete Upper 16″ .223 Wylde Mid-Length Barrel SM12.7 Anodized APAR700304M9
$499.99Aero Precision M4E1-T Complete Upper 16″ .223 Wylde Mid-Length Barrel SM12.7 Anodized APAR700304M9
Earn 499 Points -
AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsMCS AR-15 16in Complete Upper .223 Wylde Bronze Upper MLOK
$449.99MCS AR-15 16in Complete Upper .223 Wylde Bronze Upper MLOK
Earn 449 Points -
AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun Parts
MCS AR-15 16in Complete Upper .223 Wylde Purple Upper MLOK
$449.99MCS AR-15 16in Complete Upper .223 Wylde Purple Upper MLOK
Earn 449 Points -
AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 .223 Wylde Complete Upper w/BCG 18in 416R SS Black Nitride MLOK
$369.99BCA AR-15 .223 Wylde Complete Upper w/BCG 18in 416R SS Black Nitride MLOK
Earn 369 Points -
AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 6MM ARC Complete Upper 18in MLOK 416R SS w/BCG
$399.99BCA AR-15 6MM ARC Complete Upper 18in MLOK 416R SS w/BCG
Earn 399 Points -
AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsDavidson Defense ‘The Philosphist’ 16″ AR-15 10mm Nitride Rifle Complete Upper
$429.99Davidson Defense ‘The Philosphist’ 16″ AR-15 10mm Nitride Rifle Complete Upper
Earn 429 Points -
AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 5.56 NATO Complete Upper w/BCG 18in 416R SS Black Nitride Bear Claw Fluted Heavy Barrel MLOK
$399.99BCA AR-15 5.56 NATO Complete Upper w/BCG 18in 416R SS Black Nitride Bear Claw Fluted Heavy Barrel MLOK
Earn 399 Points -
AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 .223 Wylde AR-15 Complete Upper w/BCG, Charging Handle, 18″ Barrel 416R SS
$399.99BCA AR-15 .223 Wylde AR-15 Complete Upper w/BCG, Charging Handle, 18″ Barrel 416R SS
Earn 399 Points -
AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 Complete Upper w/BCG 7.62×39 Dual Charging Upper 10.5in Parkerized Heavy Barrel 1:10 Twist 9.5in MLOK
$349.99BCA AR-15 Complete Upper w/BCG 7.62×39 Dual Charging Upper 10.5in Parkerized Heavy Barrel 1:10 Twist 9.5in MLOK
Earn 349 Points -
AR AK Parts, AR Upper Parts, AR-15 Complete Uppers, Complete Uppers, Gun PartsBCA AR-15 Pistol Complete Upper w/BCG .300 Blackout 7.5in. Heavy Barrel 65in. MLOK
$289.99This BCA AR-15 complete 300 Blackout rifle length upper has a 7.5″ heavy barrel with a parkerized finish, and features a 1:8 twist rate, with a pistol length gas system….
Earn 289 Points -
AR AK Parts, AR Upper Parts, AR-10 Complete Upper, Complete Uppers, Gun PartsBCA AR-10 Complete Upper .243 WIN Side Charger 20in. Heavy Barrel 15in. MLOK w/BCG
$439.99This BCA AR-10 complete .243 rifle length upper has a 20″ parkerized Heavy barrel, and features a 1:8 twist rate, with a rifle length gas system. It includes the new…
Earn 439 Points
