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.

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  1. BCA AR-15 Complete Upper, 10.5” 4150 Parkerized M4 Contour Barrel, 5.56 NATO, Carbine Length Gas System, 1:8 Twist w/ 10” LWKM Rail
    BCA AR-15 Complete Upper, 10.5” 4150 Parkerized M4 Contour Barrel, 5.56 NATO, Carbine Length Gas System, 1:8 Twist w/ 10” LWKM Rail
    Sku: 622-UA556CM410.518P-10LWKM3
    Special Price $199.90 was $259.87
    • 10.5” M4 Contour Barrel
    • 4150 Chrome Moly Vanadium
    • Parkerized Finish
    • 1:8 Twist
    • 10” Lightweight Keymod Rail
    • 5.56 NATO
    • Carbine Length Gas System
    • M4 Flat-Top Forged Upper Receiver
    • Standard Bear Creek Arsenal Bolt Carrier Group
    • Charging Handle
    • LS2 Flash Hider
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  2. 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
    Sku: UA556MM41617(P)-(10)FFQ
    Special Price $199.90 was $259.87

    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
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  3. UA300CHB1618-P-875-10-FFQ-WEBMAIN
    BCA AR-15 Complete Upper Assembly, 16" Parkerized 4150 Heavy Barrel, .300 Blackout, 1:8 Twist, w/ 10" Free Floating Quad Rail, .875 Gas Block Diameter
    Sku: 639-UA300CHB1618P.875-10FFQ
    Special Price $207.90 was $297.00

    SKU: UA300CHB1618(P).875-(10)FFQ

    • 16" 4150 Parkerized Barrel w/ 1:8 Twist
    • Heavy Barrel Profile
    • 10" Quad Rail
    • .300 Blackout Caliber
    • M4 Flat Top Upper Receiver
    • Carbine Length Gas System,
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  4. BCA AR-15 Complete Upper Assembly, 5.56 NATO, 16" 4150 Black Nitride barrel, 1:7 Twist, Standard Hand Guard w/ Gas Block
    BCA AR-15 Complete Upper Assembly, 16" Black Nitride 4150 Steel Contour Barrel, 5.56 NATO, 1:7 Twist, w/ Standard Hand Guard, Gas Block
    Sku: UA556CM41617(M)-SHG(GB)
    Special Price $209.90 was $272.87

    SKU: UA556CM41617(M)-SHG(GB)

    • 16" Black nitride 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
  5. BCA 16" 5.56 NATO Parkerized 1:9, Gas Block 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, Gas Block
    Sku: 631-UA556CM41619P-SHGGB
    Special Price $209.90 was $272.87

    SKU: UA556CM41619(P)-SHG(GB)

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:9 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
  6. BCA 16" 5.56 NATO Parkerized 1:8, Gas Block 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, Gas Block
    Sku: UA556CM41618(P)-SHG(GB)
    Special Price $209.90 was $272.87

    SKU: UA556CM41618(P)-SHG(GB)

    • 16" Parkerized 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
  7. BCA 16" 5.56 NATO Parkerized 1:7, Gas Block AR-15 Complete Upper Assembly
    BCA AR-15 Complete Upper Assembly, 16" Parkerized 4150 Steel Contour Barrel, 5.56 NATO, 1:7 Twist, w/ Standard Hand Guard, Gas Block
    Sku: UA556CM41617(P)-SHG(GB)
    Special Price $209.90 was $272.87

    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
  8. 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, 1:9 Twist, w/ Standard Hand Guard, Front Sight
    Sku: 630-UA556CM41619P-SHGFS
    Special Price $209.90 was $272.87

    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
  9. 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
    Sku: 690-UA762CHB16110P-SHGGB
    Special Price $209.90 was $272.87

    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
  10. 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
    Sku: 612-UA223WCM41617P-SHGFS
    Special Price $209.90 was $272.87

    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
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176 items

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