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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 82 total

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  1. BCA 300 BLACKOUT 10.5" MLOK COMPLETE UPPER

    BCA .300 Blackout 10.5" AR-15 M-LOK Complete Upper Assembly

    $279.00

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

    • 10.5" 416R Stainless Steel Barrel w/ 1:7 Twist
    • Heavy Barrel Profile
    • 10" M-LOK Rail
    • .300 Caliber Blackout
    • M4 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 10.5" Complete Upper

    BCA 10.5" 5.56 NATO AR-15 Complete Upper Assembly

    $279.00

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

    • 10.5" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:7 Twist
    • 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
  3. BCA Dual Charging 16" 4150 Parkerized 5.56 NATO 1:9 Twist w/ Gas Block AR-15 Complete Upper Assembly

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

    Special Price $219.00

    (Was $319.00 )

    SKU: UADC556CM41619(P)-SHG(GB)

    • 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
  4. The BCA Brown Bear II 16" .223 WYLDE / 5.56 NATO AR-15 Complete Upper Assembly

    The BCA Brown Bear II 16" .223 WYLDE / 5.56 NATO AR-15 Complete Upper Assembly

    Special Price $199.90

    (Was $269.00 )

    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
  5. BCA Branded 16" 6.5 Grendel Type II AR-15 Complete Upper Assembly

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

    $283.49

    SKU: UA6.5CM41618(M)-SHG

    • 16" Black Nitride 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
  6. BCA 16" 416R Stainless Steel .223 WYLDE / 5.56 NATO 1:7 Twist w/ Gas Block AR-15 Complete Upper Assembly

    BCA 16" 416R Stainless Steel .223 WYLDE / 5.56 NATO 1:7 Twist w/ Gas Block AR-15 Complete Upper Assembly

    Special Price $209.90

    (Was $279.00 )

    SKU: UA223WCM41617(SS)-SHG(GB)

    • 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
  7. BCA 47 DUAL CHARGING 16" 4150 PARKERIZED 7.62X39 1:10 TWIST W/ FRONT SIGHT COMPLETE UPPER ASSEMBLY

    BCA 47 Dual Charging 16" 4150 Parkerized 7.62x39 1:10 Twist w/ Front Sight Complete Upper Assembly

    Special Price $219.00

    (Was $376.65 )

    SKU: UADC762CHB16110(P)-SHG(FS)

    Learn More
  8. BCA 16" 416R STAINLESS STEEL 7.62X39 1:10 TWIST W/ GAS BLOCK AR-15 COMPLETE UPPER ASSEMBLY

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

    Special Price $209.90

    (Was $299.00 )

    SKU: UA762CHB16110(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
  9. BCA 16" 5.56 NATO Parkerized 1:7, Gas Block AR-15 Complete Upper Assembly

    BCA AR-15 Complete Upper Assembly, 5.56 NATO, 16" 4150 Parkerized barrel, 1:7 Twist, Standard Hand Guard w/ Gas Block

    Special Price $199.90

    (Was $289.00 )

    SKU: UA556CM41617(P)-SHG(GB)

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:7 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
  10. BCA ANDEAN BEAR COMPLETE UPPER

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

    $289.00

    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
  11. BCA Dual Charging 16" 4150 Parkerized .223 WYLDE 1:7 Twist w/ Front Sight AR-15 Complete Upper Assembly

    BCA Dual Charging 16" 4150 Parkerized .223 WYLDE 1:7 Twist w/ Front Sight AR-15 Complete Upper Assembly

    Special Price $219.00

    (Was $319.00 )

    SKU: UADC223WCM41617(P)-SHG(FS)

    • 16" Parkerized 4150 Chrome Moly Vanadium 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
  12. BCA Branded 300 Blackout 15" M-LOK 16" AR-15 Complete Upper Assembly

    BCA Branded 300 Blackout 15" M-LOK 16" AR-15 Complete Upper Assembly

    $289.00

    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
  13. The BCA Brown Bear 16" .223 Wylde AR-15 Complete Upper Assembly

    The BCA Brown Bear 16" .223 Wylde AR-15 Complete Upper Assembly

    Special Price $199.90

    (Was $269.00 )

    SKU: UA223WCM41619(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
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  14. BCA DUAL CHARGING 16" 4150 PARKERIZED 5.56 NATO 1:7 TWIST W/ GAS BLOCK AR-15 COMPLETE UPPER ASSEMBLY

    BCA Dual Charging 16" 4150 Parkerized 5.56 NATO 1:7 Twist w/ Gas Block AR-15 Complete Upper Assembly

    Special Price $219.00

    (Was $319.00 )

    SKU: UADC556CM41617(P)-SHG(GB)

    • 16" Parkerized 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
  15. Back

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

    $359.00

    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
  16. 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

    $289.00

    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
  17. The BCA Premium Brown Bear 16" .223 WYLDE AR-15 Complete Upper Assembly

    The BCA Premium Brown Bear 16" .223 WYLDE AR-15 Complete Upper Assembly

    $289.00

    SKU: UA223WCM41619(M)-SHG

    • 16" Black Nitride 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
  18. BCA 16" 416R Stainless Steel 5.56 NATO 1:9 Twist w/ Front Sight AR-15 Complete Upper Assembly

    BCA 16" 416R Stainless Steel 5.56 NATO 1:9 Twist w/ Front Sight AR-15 Complete Upper Assembly

    Special Price $209.90

    (Was $279.00 )

    SKU: UA556CM41619(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
  19. BCA Branded 16" 6.5 Grendel Type II 416R Stainless Steel AR-15 Complete Upper Assembly

    BCA Branded 16" 6.5 Grendel Type II 416R Stainless Steel AR-15 Complete Upper Assembly

    $310.37

    SKU: UA6.5CM41618(SS)

    • 16" 416R Stainless Steel Barrel w/ 1:8 Twist
    • Heavy 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. Ursid Hybrid Upper Parkarized with BCG

    URSID HYBRID BEAR Parkarized 16" .223 WYLDE AR-15 Complete Upper Assembly

    $279.00

    Out of stock

    SKU: UA223WCM41618(P)-(15)LWKM

    • 16" Parkerized 4150 Chrome Moly Vanadium 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
  21. BCA 16" 416R Stainless Steel 5.56 NATO 1:9 Twist w/ Gas Block AR-15 Complete Upper Assembly

    BCA 16" 416R Stainless Steel 5.56 NATO 1:9 Twist w/ Gas Block AR-15 Complete Upper Assembly

    Special Price $209.90

    (Was $279.00 )

    SKU: UA556CM41619(SS)-SHG(GB)

    • 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
  22. BCA 16" 5.56 NATO Standard Hand Guard AR-15 Complete Upper Assembly

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

    Special Price $199.90

    (Was $269.00 )

    SKU: UA556CM41617(P)-SHG(FS)

    • 16" Parkerized 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
  23. BCA 16" 4150 Parkerized .223 WYLDE 1:7 w/ Gas Block AR-15 Complete Upper Assembly

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

    Special Price $199.90

    (Was $289.00 )

    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
  24. BCA 16" MLOK Complete Upper

    BCA Branded 16" .223 Wylde / 5.56 NATO M-LOK AR-15 Complete Upper Assembly

    $299.00

    SKU: UA223WCM41619(M)-(15)MLOK

    • 16" Black Nitride 4150 Chrome Moly Vanadium Barrel w/ 1:9 Twist
    • Contour Barrel Profile
    • 15" Keymod Rail
    • .223 WYLDE / 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
  25. BCA DUAL CHARGING 16" 4150 PARKERIZED 5.56 NATO 1:9 TWIST W/ FRONT SIGHT AR-15 COMPLETE UPPER ASSEMBLY

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

    Special Price $219.00

    (Was $319.00 )

    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

Items 1 to 25 of 82 total

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