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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 148 total

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  1. 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 Complete Pistol Upper Assembly, 10.5" Parkerized 4150 Steel Contour Barrel, .223 Wylde, Carbine Length Gas System, 1:7 Twist w/ 10" Free Floating Quad Rail

    $385.99

    Out of stock

    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
    • Forged Upper Receiver
    • Carbine Length Gas System, .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" 4150 Parkerized M4 Contour Barrel, 5.56 NATO, Corbine 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, Corbine 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
  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" 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

    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
  5. 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

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

    $349.99

    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 Dual Charging AR-15 Complete Upper Assembly, 16" 416R Stainless Steel Barrel, 5.56 NATO, 1:9 Twist, Standard Hand Guard w/ Front Sight

    BCA Dual Charging AR-15 Complete Upper Assembly, 16" 416R Stainless Steel Barrel, 5.56 NATO, 1:9 Twist, Standard Hand Guard w/ Front Sight

    $355.99

    SKU: UADC556CM41619(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
  8. BCA 16" 4150 Parkerized .223 WYLDE 1:7 w/ Gas Block AR-15 Complete Upper Assembly

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

    $315.99

    SKU: UA223WCM41617(P)-SHG(GB)

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:7 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
  9. BCA DUAL CHARGING 16" 4150 PARKERIZED 5.56 NATO 1:9 TWIST W/ FRONT SIGHT AR-15 COMPLETE UPPER ASSEMBLY

    BCA Dual Charging AR-15 Complete Upper Assembly 16" 4150 Parkerized 5.56 NATO 1:9 Twist w/ Front Sight

    $350.99

    SKU: UADC556CM41619(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
  10. BCA AR-15 Complete Upper Assembly, 16" 416R Stainless Steel Black Nitride Heavy Barrel, .223 Wylde, 1:8 Twist, Bear Claw Fluted w/ 12" Lightweight Keymod Rail

    BCA AR-15 Complete Upper Assembly, 16" 416R Stainless Steel Black Nitride Heavy Barrel, .223 Wylde, 1:8 Twist, Bear Claw Fluted w/ 12" Lightweight Keymod Rail

    $344.99

    SKU: UA223WCHB1618(SSBCF)-(12)LWKM

    • 16" 416R Stainless Steel Barrel w/ Black Nitride Finish
    • Heavy Barrel Profile
    • 1:8 Twist
    • Bear Claw Flutes
    • 12" LWKM Keymod
    • .223 Wylde Caliber
    • Carbine Length Gas System
    Learn More
  11. BCA Dual Charging AR-15 Complete Upper Assembly, 16" 416R Stainless Steel Barrel, .223 WYLDE, 1:8 Twist, Standard Hand Guard w/ Front Sight

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

    $381.99

    Out of stock

    SKU: UADC223WCM41618(SS)-SHG(FS)

    • 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
  12. BCA Kodiak AR-15 Complete Upper Assembly, 16" Parkerized 4150 Steel Contour Barrel, .223 Wylde, 1:9 Twist w/ 10" Free Floating Quad Rail

    BCA Kodiak AR-15 Complete Upper Assembly, 16" Parkerized 4150 Steel Contour Barrel, .223 Wylde, 1:9 Twist w/ 10" Free Floating Quad Rail

    $355.99

    Out of stock

    SKU: UA223WCM41619(P)-(10)FFQ

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:9 Twist
    • Contour Barrel Profile
    • 10" Quad 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
  13. BCA DUAL CHARGING 16" 4150 PARKERIZED .223 WYLDE 1:7 TWIST W/ GAS BLOCK AR-15 COMPLETE UPPER ASSEMBLY

    BCA AR-15 Dual Charging Complete Pistol Upper Assembly: 16" 4150 Parkerized M4 Contour Barrel, .223 WYLDE, Carbine Length Gas System, 1:7 Twist, Standard Hand Guard w/ Gas Block

    $376.99

    SKU: UADC223WCM41617(P)-SHG(GB)

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:7 Twist
    • M4 Contour Barrel Profile
    • Standard Hand Guard
    • Low Profile Gas Block
    • .223 WYLDE Caliber
    • M4 Flat Top Upper Receiver
    • Dual Charging
    • Carbine Length Gas System, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handles
    • Bird Cage Flash Hider
    Learn More
  14. BCA 47 Standard w/ Front Sight 18" 7.62x39 AR-15 Complete Upper Assembly

    BCA 47 AR-15 Complete Upper Assembly, 16" 4150 Parkerized Heavy Barrel, 7.62x39, Carbine Length Gas System, 1:10 Twist, Standard Hand Guard w/ Front Sight

    $315.99

    Out of stock

    SKU: UA762CHB16110(P)-SHG(FS)

    • 16" 4150 Parkerized 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
  15. BCA AR-15 Complete Upper Assembly, .223 WYLDE, 16" 4150 Black Nitride barrel, 1:9 Twist, Standard Hand Guard w/ Front Sight

    BCA AR-15 Complete Upper Assembly, 16" Black Nitride 4150 Steel Contour Barrel, .223 Wylde, 1:9 Twist w/ Standard Hand Guard, A2 Front Sight

    $325.99

    SKU: UA223WCM41619(M)-SHG(FS)

    • 16" Black Nitride 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
  16. BCA 47  Standard

    BCA 47 Standard AR-15 Complete Upper Assembly, 7.62x39, 16" 4150 Parkerized Barrel, 1:10 Twist, Standard Hand Guard w/ Gas Block

    $315.99

    Out of stock

    SKU: UA762CHB16110(P)-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
  17. BCA 16" 416R Stainless Steel .223 WYLDE / 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, .223 Wylde, 1:7 Twist w/ Standard Hand Guard, A2 Front Sight

    $320.99

    SKU: UA223WCM41617(SS)-SHG(FS)

    • 16" 416R Stainless Steel 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
  18. BCA Side Charging AR-15 Complete Upper Assembly, 16" 4150 Parkerized Heavy Barrel, 7.62x39, Carbine Length Gas System, 1:10 Twist w/  12" Lightweight Keymod

    BCA Side Charging AR-15 Complete Upper Assembly, 16" 4150 Parkerized Heavy Barrel, 7.62x39, Carbine Length Gas System, 1:10 Twist w/ 12" Lightweight Keymod

    $299.90

    Out of stock

    SKU: UASC762CHB16110(P)-(12)LWKM

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:10 Twist
    • Heavy Barrel Profile
    • 12" Lightweight Keymod
    • 7.62x39 Caliber
    • M4 Flat Top Side Charging Upper Receiver
    • Carbine Length Gas System
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  19. BCA AR-15 Complete Upper Assembly: 16" 4150 Parkerized Barrel, 1:8 Twist, 6.5 Gendel Type II

    BCA AR-15 Complete Upper Assembly: 16" 4150 Parkerized Barrel, 1:8 Twist, 6.5 Gendel Type II

    $312.99

    SKU: UA6.5CM41618(P)

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:8 Twist
    • Contour Barrel Profile
    • Standard Hand Guard
    • 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, 5.56 NATO, 16" 4150 Black Nitride barrel, 1:8 Twist, Standard Hand Guard w/ Gas Block

    BCA AR-15 Complete Upper Assembly, 16" Black Nitride 4150 Steel Contour Barrel, 5.56 NATO, 1:8 Twist, w/ Standard Hand Guard, Gas Block

    $325.99

    SKU: UA556CM41618(M)-SHG(GB)

    • 16" Black nitride 4150 Chrome Moly Vanadium Barrel w/ 1:8 Twist
    • Contour
    • Standard Hand Guard
    • 5.56 NATO 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
  21. BCA URSID HYBRID BEAR AR-15 Complete Upper Assembly, 16" 416R Stainless Steel Contour Barrel, .223 Wylde, 1:8 Twist w/ 15" Lightweight Keymod Rail

    BCA URSID HYBRID BEAR AR-15 Complete Upper Assembly, 16" 416R Stainless Steel Contour Barrel, .223 Wylde, 1:8 Twist w/ 15" Lightweight Keymod Rail

    $395.99

    Out of stock

    SKU: UA223WCM41618(SS)-(15)LWKM

    • 16" 416R Stainless Steel Barrel w/ 1:8 Twist
    • Contour Barrel Profile
    • 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
  22. BCA 16" 416R Stainless Steel .223 WYLDE 1:9 Twist w/ Gas Block AR-15 Complete Upper Assembly

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

    $320.99

    SKU: UA223WCM41619(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
  23. BCA AR-15 Complete Upper Assembly, 16" 416R Black Nitride Heavy Barrel, Bear Claw Fluted, .223 Wylde, Carbine Length Gas System, 1:8 Twist w/ 10" LWKM

    BCA AR-15 Complete Upper Assembly, 16" 416R Black Nitride Heavy Barrel, Bear Claw Fluted, .223 Wylde, Carbine Length Gas System, 1:8 Twist w/ 10" LWKM

    $344.99

    SKU: UA223WCHB1618(SSBCF)-(10)LWKM

    • 16" 416R Stainless Barrel w/ 1:8 Twist
    • Heavy Barrel Profile
    • 10" LWKM Rail
    • .223 Wylde Caliber
    • Carbine Length Gas System
    • M4 Flat Top Forged Upper Receiver
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    • Rear Sight/Front Sight
    Learn More
  24. BCA AR-15 Complete Upper Assembly 5.56 NATO, 16" 4150 Black Nitride Heavy Barrel, 1:7 Twist w/ 15" Lightweight Keymod

    BCA AR-15 Complete Upper Assembly 5.56 NATO, 16" 4150 Black Nitride Heavy Barrel, 1:7 Twist w/ 15" Lightweight Keymod

    $395.99

    SKU: UA556MM41617(M)-(15)LWKM

    • 16" 4150 Black Nitride Barrel w/ 1:7 Twist
    • Heavy Barrel Profile
    • LWKM
    • 5.56 NATO Caliber
    • M4 Flat Top Upper Receiver
    • Mid Length Gas System,
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  25. BCA Dual Charging AR-15 Complete Upper Assembly, 16" 416R Stainless Steel Barrel, .223 WYLDE, 1:7 Twist, Standard Hand Guard w/ Front Sight

    BCA Dual Charging AR-15 Complete Upper Assembly, 16" 416R Stainless Steel Barrel, .223 WYLDE, 1:7 Twist, Standard Hand Guard w/ Front Sight

    $381.99

    SKU: UADC223WCM41617(SS)-SHG(FS)

    • 16" 416R Stainless Steel Barrel w/ 1:7 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

Items 1 to 25 of 148 total

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