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 AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA-15 .300 Blackout 16″ Stainless Black Nitride Fluted Heavy Barrel Complete Upper w/BCG Side Charger
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…
Earn 399 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-15 .22WMR Side Charger Complete Upper 16in MLOK w/BCG
BCA AR-15 .22WMR Side Charger Complete Upper 16in MLOK w/BCG
Earn 299 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-15 5.56 NATO Side Charger Complete Upper w/BCG 20in 416R SS Black Nitride Bear Claw Barrel MLOK
BCA AR-15 5.56 NATO Side Charger Complete Upper w/BCG 20in 416R SS Black Nitride Bear Claw Barrel MLOK
Earn 349 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA BC-15 .17HMR Side Charging Complete Upper w/BCG, 10rd Mag
BCA BC-15 .17HMR Side Charging Complete Upper w/BCG, 10rd Mag
Earn 299 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA-15 7.62×39 AR-15 Pistol Complete Upper 7.5″ Barrel, 7″ MLOK Side Charger w/BCG
This BCA AR-15 complete 7.62×39 pistol length upper has a 7.5″ heavy barrel with a parkerized finish, and features a 1:10 twist rate, with a pistol length gas system. It…
Earn 329 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
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
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….
Earn 399 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
Aero Precision M4E1-T Complete Upper 16″ .223 Wylde Mid-Length Barrel SM12.7 Anodized APAR700304M9
Aero Precision M4E1-T Complete Upper 16″ .223 Wylde Mid-Length Barrel SM12.7 Anodized APAR700304M9
Earn 499 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-10 .308 Side Charger 24in 416R Stainless Light-Weight Complete Upper w/BCG
BCA AR-10 .308 Side Charger 24in 416R Stainless Light-Weight Complete Upper w/BCG
Earn 399 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
MCS AR-15 16in Complete Upper .223 Wylde Bronze Upper MLOK
MCS AR-15 16in Complete Upper .223 Wylde Bronze Upper MLOK
Earn 449 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
MCS AR-15 16in Complete Upper .223 Wylde Purple Upper MLOK
MCS AR-15 16in Complete Upper .223 Wylde Purple Upper MLOK
Earn 449 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-15 .410 Shotgun Side Charger Complete Upper 20in MLOK w/BCG
BCA AR-15 .410 Shotgun Side Charger Complete Upper 20in MLOK w/BCG
Earn 359 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-15 .223 Wylde Complete Upper w/BCG 18in. 416R SS Black Nitride MLOK
BCA AR-15 .223 Wylde Complete Upper w/BCG 18in. 416R SS Black NItride MLOK
Earn 349 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-15 6MM ARC Complete Upper 18in MLOK 416R SS w/BCG
BCA AR-15 6MM ARC Complete Upper 18in MLOK 416R SS w/BCG
Earn 399 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
Luth-AR LR308 A3 Assembled Upper Receiver with Charging Handle Anodized Black
Luth-AR has an upper receiver for your next build or upgrade. Made from aluminum and made to last it comes with the dust cover and a charging handle and is…
Earn 179 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-15 6.5 Grendel Left Side Charging Complete Upper w/BCG 16in Barrel
BCA AR-15 6.5 Grendel Left Side Charging Complete Upper w/BCG 16in Barrel
Earn 389 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-10 .243 Win Right Side Charger Complete Upper w/BCG 22in Barrel
BCA AR-10 .243 Win Right Side Charger Complete Upper w/BCG 22in Barrel
Earn 399 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-15 .22LR Side Charger 16in Complete Upper w/BCG, Buffer, Spring
BCA AR-15 .22LR Side Charger 16in Complete Upper w/BCG, Buffer, Spring
Earn 329 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-10 .308 WIN Complete Upper w/BCG 18in MLOK
BCA AR-10 .308 WIN Complete Upper w/BCG 18in MLOK
Earn 399 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BC-10 | .308 Right Side Charging Upper | 16″ Parkerized Heavy | 1:10 Twist | Mid-Length Gas System | 15″ MLOK Split Rail w/BCG
This BCA AR-10 complete .308 rifle length upper has a 16″ parkerized Heavy barrel, and features a 1:10 twist rate, with a mid-length gas system. It includes a 15″ MLOK…
Earn 399 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-10 .22-250 REM Sporter Slid Side Complete Upper w/BCG 20in. Parkerized Heavy Barrel 1:14 Twist MLOK
BCA AR-10 .22-250 REM Sporter Slid Side Complete Upper w/BCG 20in. Parkerized Heavy Barrel 1:14 Twist MLOK
Earn 419 Points -
AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-15 Complete Upper w/BCG 7.62×39 Dual Charging Upper 10.5in Parkerized Heavy Barrel 1:10 Twist 9.5in MLOK
BCA 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, Complete Uppers, Gun Parts
BCA Complete AR-15 Upper w/BCG 6.5 Grendel Sporter Slick Side 20in 416R SS Heavy Barrel MLOK
This BCA AR-15 complete 6.5 Grendel rifle length upper has a 20″ heavy barrel with a 416R stainless steel finish, and features a 1:8 twist rate, with a rifle length…
Earn 369 Points -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-10 Complete Upper .243 WIN Side Charger 20in. Heavy Barrel 15in. MLOK w/BCG
This 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 -
AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA BC-15 .350 Legend Side Charging Complete Upper w/BCG 18in. Brl Heavy Barrel 15in. MLOK
BCA BC-15 .350 Legend Side Charging Complete Upper w/BCG 18in. Brl Heavy Barrel 15in. MLOK
Earn 399 Points