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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 123 total

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  1. BCA 300 BLACKOUT 10.5" MLOK COMPLETE UPPER

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

    $287.99

    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
    • .300 Blackout Flat Top 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 Upper Assembly 10.5" 4150 Black Nitrite Barrel 9MM 1:10 Twist Standard Hand Guard w/ Gas Block

    BCA Branded Complete Upper Assembly: 10.5" 4150 Black Nitride 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
  3. BCA Pistol AR-15 Complete Upper Assembly, 10.5" Parkerized 4150 Steel Barrel, .223 Wylde, 1:7 Twist w/ 10" Free Floating Quad Rail

    BCA AR-15 Pistol Complete Upper Assembly, 10.5" Parkerized 4150 Steel Contour Barrel, .223 Wylde, 1:7 Twist w/ 10" Free Floating Quad Rail

    $297.99

    SKU: UA223WCM410.517(P)-(10)FFQ

    • 10.5" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:7 Twist
    • M4 Contour Barrel Profile
    • 10" Free Floating 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
  4. BCA 10.5" Complete Upper

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

    $287.99

    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
    • M4 Flat Top 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 13.5" 4150 Black Nitrite Barrel 9MM 1:10 Twist Standard Hand Guard w/ Gas Block

    BCA Branded 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
  6. BCA AR-15 Complete Upper Assembly 9MM, 13.5" 4150 Black Nitrite Barrel, 1:10 Twist w/ 10 MLOK

    BCA Branded 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
  7. BCA AR-15 Complete Upper Assembly, 7.62x39, 16" 4150 Black Nitride Barrel, 1:10 Twist, Standard Hand Guard w/ Gas Block

    BCA AR-15 Complete Upper Assembly, 7.62x39, 16" 4150 Black Nitride Barrel, 1:10 Twist, Standard Hand Guard w/ Gas Block

    $313.99

    Out of stock

    SKU: UA762CHB16110(M)-SHG(GB)

    • 16" Black Nitride 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
  8. The BCA AR-15 Ursid Hybrid Bear Upper Assembly: 16" 4150 Parkerized Barrel, .223 WYLDE, 1:8 Twist w/ 15" LWKM (BCG and Charging Handle not included)

    The BCA AR-15 Ursid Hybrid Bear Upper Assembly: 16" 4150 Parkerized Barrel, .223 WYLDE, 1:8 Twist w/ 15" LWKM (BCG and Charging Handle not included)

    $224.99

    SKU: UHA223WCM41618(P)-(15)LWKM

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:8 Twist
    • Contour Barrel Profile
    • 15" Light Weight Keymod
    • .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
  9. BCA 16" 416R Stainless Steel 5.56 NATO 1:7 Twist w/ Front Sight AR-15 Complete Upper Assembly

    BCA AR-15 Complete Upper Assembly, 16" 416R Stainless Steel Contour Barrel, 5.56 NATO, 1:7 Twist, w/ Standard Hand Guard, Front Sight

    $287.99

    SKU: UA556CM41617(SS)-SHG(FS)

    • 16" 416R Stainless Steel Barrel w/ 1:9 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
  10. 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

    $307.99

    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
  11. BCA AR-15 Complete Upper Assembly 9MM, 16" 4150 Black Nitrite Barrel, 1:10 Twist w/ 15 MLOK

    BCA Branded Complete Upper Assembly 9MM, 16" 4150 Black Nitride Barrel, 1:10 Twist w/ 15 MLOK

    $349.99

    Out of stock

    SKU: UA9MMCM416110(M)-(15)MLOK

    • 16" 4150 Black Nitride Barrel w/ 1:10 Twist
    • Contour Barrel Profile
    • 15" MLOK
    • 223 Wylde Caliber
    • Carbine Length Gas System,
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  12. SIDE CHARGING 16" STAINLESS BARREL WITH 15" LIGHT WEIGHT KEY MOD

    SIDE CHARGING 16" STAINLESS BARREL WITH 15" LIGHT WEIGHT KEY MOD

    $499.99

    SKU: UASC223WCM41618(SS)-(15)LWKM

    Learn More
  13. BCA ANDEAN BEAR COMPLETE UPPER

    BCA Andean Bear 16" 5.56 NATO AR-15 Complete Upper Assembly

    $297.99

    SKU: UA556MM41617(P)-(15)LWKM

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:7 Twist
    • Contour Barrel Profile
    • 15" Keymod 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
  14. BCA Dual Charging AR-15 Complete Upper Assembly, 16" 416R Stainless Steel Barrel, .223 WYLDE, 1:9 Twist, Standard Hand Guard w/ Gas Block

    BCA Dual Charging AR-15 Complete Upper Assembly, 16" 416R Stainless Steel Barrel, .223 WYLDE, 1:9 Twist, Standard Hand Guard w/ Gas Block

    $354.99

    SKU: UADC223WCM41619(SS)-SHG(GB)

    • 16" 416R Stainless Steel 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
  15. BCA 16" 5.56 NATO Standard Hand Guard 1:9 Front Sight AR-15 Complete Upper Assembly

    BCA AR-15 Complete Upper Assembly, 16" Parkerized 4150 Steel Contour Barrel, 5.56 NATO, 1:9 Twist, w/ Standard Hand Guard, Front Sight

    $277.99

    SKU: UA556CM41619(P)-SHG(FS)

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:9 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
  16. The BCA Left Hand Side Charging Brown Bear 5.56 NATO, 16" 4150 Parkerized M4 Contour Barrel, 1:9 Twist, Standard Handguard w/ Front Sight AR-15 Complete Upper Assembly

    The BCA Left Hand Side Charging Brown Bear 5.56 NATO, 16" 4150 Parkerized M4 Contour Barrel, 1:9 Twist, Standard Handguard w/ Front Sight AR-15 Complete Upper Assembly

    $339.99

    SKU: UALSC556CM41619(P)-SHG(FS)

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:9 Twist
    • M4 Contour Barrel Profile
    • Standard Hand Guard
    • 5.56 NATO Caliber
    • M4 Flat Top Upper Receiver
    • BCA Standard BCG
    • Side Charging Handle
    • Bird Cage Flash Hider
    Learn More
  17. BCA AR-15 Complete Upper Assembly, 16" Parkerized 4150 Countour Barrel, .300 Blackout, 1:7 Twist w/ 15" M-LOK Rail

    BCA AR-15 Complete Upper Assembly, 16" Parkerized 4150 Countour Barrel, .300 Blackout, 1:7 Twist w/ 15" M-LOK Rail

    $297.99

    Out of stock

    SKU: UA300CM41617(P)-(15)MLOK

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:7 Twist
    • Contour Barrel Profile
    • .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
  18. BCA Dual Charging AR-15 Complete Upper Assembly, 16" 416R Stainless Steel Barrel, 7.62x39, 1:10 Twist, Standard Hand Guard w/ Gas Block

    BCA Dual Charging AR-15 Complete Upper Assembly, 16" 416R Stainless Steel Barrel, 7.62x39, 1:10 Twist, Standard Hand Guard w/ Gas Block

    $414.99

    Out of stock

    SKU: UADC762CHB16110(SS)-SHG(GB)

    • 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
  19. BCA 16" 4150 Parkerized .223 WYLDE 1:9 w/ Gas Block AR-15 Complete Upper Assembly

    BCA AR-15 Complete Upper Assembly, 16" Parkerized 4150 Steel Contour Barrel, .223 Wylde, 1:9 Twist w/ Standard Hand Guard, Gas Block

    $297.99

    SKU: UA223WCM41619(P)-SHG(GB)

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:9 Twist
    • Contour
    • Standard Hand Guard
    • .223 WYLDE 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
  20. Back

    BCA 16", .223 WYLDE Left Handed Complete Upper Assembly

    $369.99

    SKU: UALSC223WCM41617(P)-(15)LWKM

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:7 Twist
    • Contour Barrel Profile
    • 15" Keymod Rail
    • .223 WYLDE Caliber
    • M4 Flat Top Left Dual Charging Upper Receiver
    • Carbine Length Gas System, .750 Diameter Gas Block
    • BCA Left Handed BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  21. BCA Dual Charging AR-15 Complete Upper Assembly, 16" 416R Stainless Steel Barrel, .223 WYLDE, 1:8 Twist, Standard Hand Guard w/ Gas Block

    BCA Dual Charging AR-15 Complete Upper Assembly, 16" 416R Stainless Steel Barrel, .223 WYLDE, 1:8 Twist, Standard Hand Guard w/ Gas Block

    $354.99

    SKU: UADC223WCM41618(SS)-SHG(GB)

    • 16" 416R Stainless Steel Barrel w/ 1:8 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. THE DUAL CHARGING BCA BROWN BEAR 16" 4150 PARKERIZED .223 WYLDE 1:9 TWIST W/ GAS BLOCK AR-15 COMPLETE UPPER ASSEMBLY

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

    $344.99

    Out of stock

    SKU: UADC223WCM41619(P)-SHG(GB)

    • 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
  23. BCA 47 Standard 15" Keymod16" 7.62x39 AR-15 Complete Upper Assembly

    BCA Branded 47 Standard 15" Keymod16" 7.62x39 AR-15 Complete Upper Assembly

    $297.99

    SKU: UA762CHB16110(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 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
  24. 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

    $284.00

    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
  25. The BCA Black Bear Complete Upper Assembly, 16" 4150 Parkerized Barrel, .300 Blackout, 1:8 Twist, with 10" Free Floating Quad Rail

    BCA Black Bear AR-15 Complete Upper Assembly, 16" 4150 Parkerized Heavy Barrel, .300 Blackout, 1:8 Twist, w/ 10" Free Floating Quad Rail, .750 Gas Block Diameter

    $287.99

    SKU: UA300CHB1618(P).750-(10)FFQ

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:8 Twist
    • Heavy Barrel Profile
    • 10" Free Floating Quad 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

Items 1 to 25 of 123 total

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