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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.
- 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
$329.99This 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…
- 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
$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….
- AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts, Upper Receivers
.308, 18″ Parkerized SOCOM Barrel, 1:10 Twist, Mid Length Gas System, 15″ MLOK Split Rail|Sporter Upper w/BCG
$499.99This BCA AR-10 complete .308 Sporter rifle length upper has a 18″ Parkerized mid weight (SOCOM) barrel, and features a 1:10 twist rate, with a mid length gas system. It…
- AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
IFC .410 Shotshell AR-15 Complete Upper Receiver Assembly 18.5″ Barrel 2-1/2″ Chamber Flip-Up Sights Quadrail Black
$449.99Convert your AR-15 platform rifle into versatile .410 Bore Shotgun with an Iron Armi Complete Upper Receiver Assembly from International Firearm Corporation! Starting with a flattop upper, they installed an…
- AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-10 .22-250 Forged Upper Complete w/BCG 20in. 416R SS Barrel MLOK
$439.99BCA AR-10 .22-250 Forged Upper Complete w/BCG 20in. 416R SS Barrel MLOK
- AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-10 .22-250 Forged Upper Complete w/BCG 20in. Barrel 416R SS MLOK
$429.99BCA AR-10 .22-250 Forged Upper Complete w/BCG 20in. Barrel 416R SS MLOK
- AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-10 .22-250 Side Charger Forged Upper Complete w/BCG 20in. Barrel 416R SS MLOK
$439.99BCA AR-10 .22-250 Side Charger Forged Upper Complete w/BCG 20in. Barrel 416R SS MLOK
- AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-15 Pistol Complete Upper w/BCG 5.56NATO Side Charger 416R SS 10.5in. Barrel
$339.99BCA AR-15 Pistol Complete Upper w/BCG 5.56NATO Side Charger 416R SS 10.5in. Barrel
- AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-10 .243 Winchester Forged Upper 22in 416R SS Light-Weight Barrel w/BCG MLOK
$429.99The BCA AR-10 Complete Upper Assembly has a 22″ 416R Stainless Steel light-weight barrel, a rifle length gas system, and a 1:8 twist rate. This upper features our lightweight barrel…
- AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-10 .243 Winchester Sporter Slick Side Upper 20in. Heavy Barrel MLOK w/BCG
$399.99This 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…
- 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
$419.99BCA AR-10 .22-250 REM Sporter Slid Side Complete Upper w/BCG 20in. Parkerized Heavy Barrel 1:14 Twist MLOK
- 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
$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
- AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-15 Complete Upper w/BCG .300 Blackout Side Charger 16in. Parkerized Heavy Barrel 1:8 Twist MLOK
$359.99This BCA AR-15 complete 300 Blackout rifle length upper has a 16″ heavy barrel with a parkerized finish, and features a 1:8 twist rate, with a carbine length gas system….
- 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
$369.99This 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…
- AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-10 Complete Upper w/BCG 6.5 Creedmoor Side Charger 20in 416R SS Fluted Heavy Barrel 15in. MLOK
$419.99BCA AR-10 Complete Upper w/BCG 6.5 Creedmoor Side Charger 20in 416R SS Fluted Heavy Barrel 15in. MLOK
- AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-9 Complete Upper w/BCG 9MM Left Side Charger, Right Side Eject 16in. M4 Barrel, 15in. MLOK
$379.99BCA AR-9 Complete Upper 9MM Left Side Charger, Right Side Eject 16in. M4 Barrel, 15in. MLOK
- AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-15 .410 Shotgun Complete Upper w/BCG 20in. Side Charging w/Full Choke 17in. MLOK
$449.99BCA AR-15 .410 Shotgun Complete Upper w/BCG 20in. Side Charging w/Full Choke 17in. MLOK
- AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-10 Complete Upper w/BCG .243 Winchester Forged 20in. Heavy Barrel 15in. MLOK
$429.99BCA AR-10 Complete Upper w/BCG .243 Winchester Forged 20in. Heavy Barrel 15in. MLOK
- AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-15 Pistol Complete Upper w/BCG 5.56 NATO Right Side Charging Upper | 7.5″ 416R SS M4 Barrel | 1:7 Twist | Pistol Length Gas System | 6.5″ MLOK – 1
$299.99This Bear Creek Arsenal AR-15 Complete 5.56 Side Charging pistol upper has a 7.5″ M4 barrel with a 416R stainless steel finish, and features a 1:7 twist, with a pistol…
- AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA AR-10 Complete Upper .308 WIN Side Charger w/BCG 20in. 416R SS Heavy Barrel 15in. MLOK
$419.99This BCA AR-10 complete .308 rifle length upper has a 20″ 416R stainless steel Heavy barrel, and features a 1:10 twist rate, with a rifle length gas system. It includes…
- AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA BC-15 .17 HMR AR-15 Pistol Complete Upper w/BCG MLOK 7.5in Barrel Side Charger
$429.99This BCA AR-15 complete .17 hmr rifle length upper has a 7.5″ heavy barrel with a parkerized finish, and features a 1:9 twist rate. It includes a 7″ MLOK rail,…
- AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA BC-15 5.56 NATO Side Charger Complete Upper w/BCG 10.5in Parkerized M4 Barrel 1:7 Twist 9.5in. MLOK
$299.99This BCA AR-15 complete 5.56 NATO rifle length upper has a 10.5″ M4 contour barrel with a parkerized finish, and features a 1:7 twist rate, with a carbine length gas…
- AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA BC-9 9MM Side Charger Bufferless Complete Upper w/BCG 16in. Parkerized M4 Barrel 1:10 Twist 15in. MLOK
$449.99This BCA AR-15 complete bufferless 9MM rifle length bufferless (Patent Pending) upper has a 16″ M4 barrel with a parkerized finish, and features a 1:10 twist rate, with a blow…
- AR AK Parts, AR Upper Parts, Complete Uppers, Gun Parts
BCA BC-15 .223 Wylde Side Charging Complete Upper 10.5in. 416R SS M4 Barrel 9.5in. MLOK w/BCG
$349.99BCA BC-15 .223 Wylde Side Charging Complete Upper 10.5in. 416R SS M4 Barrel 9.5in. MLOK w/BCG
