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Complete Upper Assemblies

Bear Creek Arsenal Complete Upper Assemblies consist of a Barrel, Flash Hider, Hand Rail, Barrel Nut, Gas Block, Gas Tube, Complete BCG (Bolt Carrier Group), and a Charging Handle.

Items 1 to 25 of 118 total

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  1. BCA AR-15 Complete Pistol Upper Assembly, 10.5" 4150 Parkerized Heavy Barrel, .300 Blackout, Pistol Length Gas System, 1:8 Twist w/ 10" MLOK

    BCA AR-15 Complete Pistol Upper Assembly, 10.5" 4150 Parkerized Heavy Barrel, .300 Blackout, Pistol Length Gas System, 1:8 Twist w/ 10" MLOK

    $315.99

    Out of stock

    SKU: UA300PHB10.518(P)-(10)MLOK

    • 10.5" Heavy Barrel
    • 4150 Chrome Moly Vanadium Steel
    • 1:8 Twist
    • Parkerized Finish
    • 10" MLOK Rail
    • .300 Blackout Caliber
    • Forged Upper Receiver
    • Pistol Length Gas Block, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  2. BCA AR-15 Complete Pistol Upper Assembly, 10.5" 416R Stainless Steel Heavy Barrel, .300 Blackout, Pistol Length Gas System, 1:7 Twist w/ 10" M-LOK Rail

    BCA AR-15 Complete Pistol Upper Assembly, 10.5" 416R Stainless Steel Heavy Barrel, .300 Blackout, Pistol Length Gas System, 1:7 Twist w/ 10" M-LOK Rail

    $398.99

    Out of stock

    SKU: UA300PHB10.517(SS)-(10)MLOK

    • 10.5" 416R Stainless Steel Barrel w/ 1:7 Twist
    • Heavy Barrel Profile
    • 10" M-LOK Rail
    • .300 Blackout Caliber
    • Forged Upper Receiver
    • Pistol Length Gas Block, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  3. BCA AR-15 Complete Upper Assembly 10.5" 4150 Black Nitrite Barrel 9MM 1:10 Twist Standard Hand Guard w/ Gas Block

    BCA AR-9 Complete Pistol Upper Assembly: 10.5" 4150 Black Nitride M Barrel, 9MM, 1:10 Twist, Standard Hand Guard w/ Gas Block

    $318.99

    Out of stock

    SKU: UA9MMCM410.5110(M)-SHG(GB)

    • 10.5" Black Nitride 4150 Chrome Moly Vanadium Barrel w/ 1:10 Twist
    • M4 Contour Barrel Profile
    • Standard Hand Guard
    • 9MM Caliber
    • BCA Standard BCG with proprietary BCA AKM Bolt
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  4. BCA AR-15 Complete Pistol Upper Assembly, 10.5" 4150 Parkerized M4 Contour Barrel, 5.56 NATO, Carbine Length Gas System, 1:7 Twist w/ 10" Lightweight Keymod Rail

    BCA AR-15 Complete Pistol Upper Assembly, 10.5" 4150 Parkerized M4 Contour Barrel, 5.56 NATO, Carbine Length Gas System, 1:7 Twist w/ 10" Lightweight Keymod Rail

    $385.99

    SKU: UA556CM410.517(P)-(10)LWKM

    • 10.5" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:7 Twist
    • M4 Contour Barrel Profile
    • 10" Keymod Rail
    • 5.56 NATO Caliber
    • Forged Upper Receiver
    • Carbine Length Gas System, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  5. BCA AR-15 Complete Upper Assembly 9MM, 13.5" 4150 Black Nitrite Barrel, 1:10 Twist w/ 10 MLOK

    BCA Complete Upper Assembly: 13.5" 4150 Black Nitride Heavy Barrel, 9MM, 1:10 Twist w/ 10" MLOK

    $349.99

    Out of stock

    SKU: UA9MMHB13.5110(M)-(10)MLOK

    • 13.5" 4150 Black Nitride Barrel w/ 1:10 Twist
    • Heavy Barrel Profile
    • 10" MLOK
    • 9MM Caliber
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  6. BCA AR-15 Complete Upper Assembly 13.5" 4150 Black Nitrite Barrel 9MM 1:10 Twist Standard Hand Guard w/ Gas Block

    BCA Complete Upper Assembly 13.5" 4150 Black Nitride Barrel 9MM 1:10 Twist Standard Hand Guard w/ Gas Block

    $318.99

    Out of stock

    SKU: UA9MMHB13.5110(M)-SHG(GB)

    • 16" Black Nitride 4150 Chrome Moly Vanadium Barrel w/ 1:10 Twist
    • Heavy Barrel Profile
    • Standard Hand Guard
    • 9MM Caliber
    • BCA Standard BCG with proprietary BCA AKM Bolt
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  7. BCA Basic Bear

    The BCA AR-15 Basic Bear: 16" 4150 Parkerized Barrel, .223 Wylde, 1:9 Twist, Standard Hand Guard w/ Front Sight (BCG and Charging Handle not included)

    $160.99

    Out of stock

    SKU: UHA223CM41619(P)-SHG(FS)

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:9 Twist
    • Contour Barrel Profile
    • Standard Hand Guard
    • .223 Wylde Caliber
    • M4 Flat Top Upper Receiver
    • Carbine Length Gas System, .750 Diameter Gas Block
    • NO BCG
    • NO CHARGING HANDLE
    • Bird Cage Flash Hider
    Learn More
  8. BCA Branded 16" 6.5 Grendel Type II 416R Stainless Steel AR-15 Complete Upper Assembly

    BCA AR-15 Complete Upper Assembly: 16" 416R Stainless Steel M4 Contour Barrel, 1:8 Twist, 6.5 Grendel Type II

    $317.99

    Out of stock

    SKU: UA6.5CM41618(SS)

    • 16" 416R Stainless Steel Barrel w/ 1:8 Twist
    • M4 Contour Profile
    • Lightweight KeyMod or M-LOK Rail
    • 6.5 Grendel Type II Caliber
    • M4 Flat Top Upper Receiver
    • Carbine Length Gas System
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  9. BCA AR-15 Complete Upper Assembly, 16" 4150 Black Nitride HeavyBarrel, .223 Wylde, Carbine Length Gas System, 1:8 Twist Rate w/ 12" MLOK

    BCA AR-15 Complete Upper Assembly, 16" 4150 Black Nitride HeavyBarrel, .223 Wylde, Carbine Length Gas System, 1:8 Twist Rate w/ 12" MLOK

    $409.99

    Out of stock

    SKU: UA223WCHB1618(M)-(12)MLOK

    • 16" Heavy Barrel
    • 4150 Chrome Moly Vanadium
    • Black Nitride Finish
    • 1:8 Twist Rate
    • .223 Wylde Caliber
    • Carbine Length Gas System
    • M4 Flat Top Forged Upper Receiver
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  10. BCA URSID HYBRID BEAR AR-15 Complete Upper Assembly, 16" Parkarized 4150 Steel Contour Barrel, .223 Wylde, 1:8 Twist w/ 15" Lightweight Keymod Rail

    BCA URSID HYBRID BEAR AR-15 Complete Upper Assembly, 16" 4150 Parkerized M4 Contour Barrel, .223 Wylde, 1:8 Twist w/ 15" Lightweight Keymod

    $385.99

    Out of stock

    SKU: UA223WCM41618(P)-(15)LWKM

    • 16" M4 Contour Barrel
    • 4150 Chrome Moly Vanadium Steel
    • 1:8 Twist
    • Parkerized Finish
    • 15" Keymod Rail
    • .223 WYLDE Caliber
    • M4 Flat Top Upper Receiver
    • Carbine Length Gas System, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  11. BCA AR-15 Side Charging Complete Upper Assembly, 16" 4150 Parkerized Heavy Barrel, 7.62x39, Carbine Length Gas System, 1:10 Twist w/ 15" MLOK - Tactical Gray Cerakote

    BCA AR-15 Side Charging Complete Upper Assembly, 16" 4150 Parkerized Heavy Barrel, 7.62x39, Carbine Length Gas System, 1:10 Twist w/ 15" MLOK - Tactical Gray Cerakote

    $399.99

    Out of stock

    SKU: UASC762CHB16110(P)-(TG)(15)

    • 16" Heavy Barrel
    • 4150 Chrome Moly Vanadium
    • Parkerized Finish
    • 1:10 Twist Rate
    • 7.62x39 Caliber
    • Carbine Length Gas System
    • Side Charging Upper Receiver
    • BCA Side Charging BCG
    • Side Charging Handle
    • Side Charging Threaded Receiver Plug
    • Tactical Gret Cerakote
    Learn More
  12. BCA Kodiak II AR-15 Complete Upper Assembly, 5.56 NATO, 16" 4150 Parkerized barrel, 1:7 Twist w/ 10" Free Floating Quad Rail

    BCA Kodiak II AR-15 Complete Upper Assembly, 5.56 NATO, 16" 4150 Parkerized barrel, 1:7 Twist w/ 10" Free Floating Quad Rail

    $355.99

    Out of stock

    SKU: UA556MM41617(P)-(10)FFQ

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:7 Twist
    • Contour Barrel Profile
    • 10" Quad Rail
    • 5.56 NATO Caliber
    • M4 Flat Top Upper Receiver
    • Mid Length Gas System, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  13. BCA Side Charging AR-15 Complete Upper Assembly, 16" Parkerized 4150 Steel Heavy Barrel, 7.62x39, 1:10 Twist w/ Lightweight Keymod Rail

    BCA Side Charging AR-15 Complete Upper Assembly, 16" Parkerized 4150 Steel Heavy Barrel, 7.62x39, 1:10 Twist w/ Lightweight Keymod Rail

    $385.99

    Out of stock

    SKU: UASC762CHB16110(P)-(15)LWKM

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:10 Twist
    • Heavy Barrel Profile
    • 15" Lightweight Keymod
    • 7.62x39 Caliber
    • M4 Flat Top Side Charging Upper Receiver
    • Carbine Length Gas System, .750 Diameter Low Profile Gas Block
    • BCA Standard BCG with proprietary BCA AKM Bolt
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  14. BCA 16" 5.56 NATO Standard Hand Guard AR-15 Complete Upper Assembly

    BCA AR-15 Complete Upper Assembly, 16" Parkerized 4150 Steel Contour Barrel, 5.56 NATO, 1:8 Twist, w/ Standard Hand Guard, Front Sight

    $329.99

    Out of stock

    SKU: UA556CM41618(P)-SHG(FS)

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:8 Twist
    • Contour Barrel Profile
    • Standard Hand Guard
    • 5.56 NATO Caliber
    • M4 Flat Top Upper Receiver
    • Carbine Length Gas System, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  15. BCA AR-15 Complete Upper Assembly, 16" Parkerized 4150 Heavy Barrel, .300 Blackout, 1:8 Twist, w/ 12" Lightweight Keymod Rail, .750 Gas Block Diameter

    BCA AR-15 Complete Upper Assembly, 16" Parkerized 4150 Heavy Barrel, .300 Blackout, 1:8 Twist, w/ 12" Lightweight Keymod Rail, .750 Gas Block Diameter

    $385.99

    Out of stock

    SKU: UA300CHB1618(P).750-(12)LWKM

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:8 Twist
    • Heavy Barrel Profile
    • 12" Keymod Rail
    • .300 Blackout Caliber
    • M4 Flat Top Upper Receiver
    • Carbine Length Gas System, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  16. BCA 16"416R STAINLESS STEEL 7.62X39 1:10 TWIST W/ FRONT SIGHT AR-15 COMPLETE UPPER ASSEMBLY

    BCA 16"416R Stainless Steel 7.62x39 1:10 Twist w/ Front Sight AR-15 Complete Upper Assembly

    $334.99

    Out of stock

    SKU: UA762CHB16110(SS)-SHG(FS)

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:10 Twist
    • Heavy Barrel Profile
    • Standard Hand Guard
    • 7.62x39 Caliber
    • M4 Flat Top Upper Receiver
    • Carbine Length Gas System, .750 Diameter Low Profile Gas Block
    • BCA Standard BCG with proprietary BCA AKM Bolt
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  17. BCA AR-15 Complete Upper Assembly, 5.56 NATO, 16" 4150 Black Nitride Barrel, 1:7 Twist, Standard Hand Guard w/ Front Sight

    BCA AR-15 Complete Upper Assembly, 16" Black Nitride 4150 Steel Contour Barrel, 5.56 NATO, 1:7 Twist, w/ Standard Hand Guard, Front Sight

    $339.99

    Out of stock

    SKU: UA556CM41617(M)-SHG(FS)

    • 16" Black Nitride 4150 Chrome Moly Vanadium Barrel w/ 1:7 Twist
    • Contour Barrel Profile
    • Standard Hand Guard
    • 5.56 NATO Caliber
    • M4 Flat Top Upper Receiver
    • Carbine Length Gas System, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  18. BCA AR-15 Complete Upper Assembly, 16" Parkerized 4150 Steel Contour Barrel, .223 Wylde, 1:7 Twist w/ Standard Hand Guard, A2 Front Sight

    BCA AR-15 Complete Upper Assembly, 16" Parkerized 4150 Steel Contour Barrel, .223 Wylde, 1:7 Twist w/ Standard Hand Guard, A2 Front Sight

    $329.99

    Out of stock

    SKU: UA223WCM41617(P)-SHG(FS)

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:7 Twist
    • Contour Barrel Profile
    • Standard Hand Guard
    • .223 WYLDE / 5.56 NATO Caliber
    • M4 Flat Top Upper Receiver
    • Carbine Length Gas System, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  19. BCA Branded 16" 6.5 Grendel Type II Black Melonite AR-15 Complete Upper Assembly

    BCA Branded 16" 6.5 Grendel Type II Black Melonite AR-15 Complete Upper Assembly

    $322.99

    Out of stock

    SKU: UA6.5CM41618(M)

    • 16" Black Nitride 4150 Chrome Moly Vanadium Barrel w/ 1:8 Twist
    • Contour Barrel Profile
    • Lightweight Keymod or M-LOK
    • 6.5 Grendel Type II Caliber
    • M4 Flat Top Upper Receiver
    • Carbine Length Gas System, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  20. BCA AR-15 Complete Upper Assembly, 16" 4150 Black Nitride HeavyBarrel, 5.56 NATO, Carbine Length Gas System, 1:7 Twist Rate w/ 12" MLOK

    BCA AR-15 Complete Upper Assembly, 16" 4150 Black Nitride HeavyBarrel, 5.56 NATO, Carbine Length Gas System, 1:7 Twist Rate w/ 12" MLOK

    $409.99

    Out of stock

    SKU: UA556CHB1617(M)-(12)MLOK

    • 16" Heavy Barrel
    • 4150 Chrome Moly Vanadium
    • Black Nitride Finish
    • 1:7 Twist Rate
    • 5.56 NATO Caliber
    • Carbine Length Gas System
    • M4 Flat Top Forged Upper Receiver
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  21. THE DUAL CHARGING BCA BROWN BEAR 16" 4150 PARKERIZED .223 WYLDE 1:9 TWIST W/ FRONT SIGHT AR-15 COMPLETE UPPER ASSEMBLY

    The Dual Charging BCA Brown Bear 16" 4150 Parkerized .223 WYLDE 1:9 twist w/ Front Sight AR-15 Complete Upper Assembly

    $364.99

    Out of stock

    SKU: UADC223WCM41619(P)-SHG(FS)

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:9 Twist
    • Contour Barrel Profile
    • Standard Hand Guard
    • .223 WYLDE Caliber
    • M4 Flat Top Upper Receiver
    • Carbine Length Gas System, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  22. 300 blackout 16" Barrel 12" Lightweight Keymod BCA Upper Assembly

    BCA AR-15 Complete Upper Assembly, 16" Parkerized 4150 Heavy Barrel, 300 Blackout, Spiral Flutes, 1:8 Twist w/ 15" Lightweight KeyMod

    $287.99

    Out of stock

    SKU: UA300CHB1618(PSF)-(15)LWKM

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:8 Twist
    • Heavy Barrel Profile
    • Spiral Fluted
    • 15" Keymod Rail
    • .300 Blackout Caliber
    • M4 Flat Top Upper Receiver
    • Carbine Length Gas System, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  23. BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized Heavy Barrel, 7.62x39, Carbine Length Gas System, 1:10 Twist w/ 15" MLOK - Tactical Gray Cerakote

    BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized Heavy Barrel, 7.62x39, Carbine Length Gas System, 1:10 Twist w/ 15" MLOK - Tactical Gray Cerakote

    $399.99

    Out of stock

    SKU: UA762CHB16110(P)-(TG)(15)LWKM

    • 16" Heavy Barrel
    • 4150 Chrome Moly Vanadium
    • Parkerized Finish
    • 1:10 Twist Rate
    • 7.62x39 Caliber
    • Carbine Length Gas System
    • M4 Flat Top Forged Upper Receiver
    • BCA Standard BCG
    • Charging Handle
    • Tactical Gret Cerakote
    Learn More
  24. BCA 47 SIDE CHARGING WITH FREE FLOAT QUAD RAIL

    BCA 47 SIDE CHARGING WITH FREE FLOAT QUAD RAIL

    $385.99

    Out of stock

    SKU: UASC762CHB16110(P)-(10)FFQ

    Learn More
  25. BCA AR-15 Complete Upper Assembly, 16" 416R Stainless Black Nitride Heavy Barrel, Bear Claw Fluted, .223 Wylde, Carbine Length Gas System, 1:8 Twist w/ 12" MLOK Rail

    BCA AR-15 Complete Upper Assembly, 16" 416R Stainless Black Nitride Heavy Barrel, Bear Claw Fluted, .223 Wylde, Carbine Length Gas System, 1:8 Twist w/ 12" MLOK Rail

    $344.99

    Out of stock

    SKU: UA223WCHB1618(SSBCF)-(12)MLOK

    • 16" 416R Stainless Steel Barrel w/ Black Nitride Finish
    • Heavy Barrel Profile
    • 1:8 Twist
    • Bear Claw Flutes
    • 12" MLOK Rail
    • .223 Wylde Caliber
    • Carbine Length Gas System
    • BCA Standard BCG
    • Charging Handle
    Learn More

Items 1 to 25 of 118 total

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