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, 16” 4150 Parkerized Heavy Barrel, .300 Blackout, Carbine Length Gas System, 1:8 Twist w/ 15” LWKM Rail
    BCA AR-15 Complete Upper, 16” 4150 Parkerized Heavy Barrel, .300 Blackout, Carbine Length Gas System, 1:8 Twist w/ 15” LWKM Rail
    Sku: 640-UA300CHB1618P-15LWKM3
    Special Price $219.99 was $298.99
    SKU: 640-UA300CHB1618P-15LWKM

    • 16” Heavy Barrel 
    • 4150 Chrome Moly Vanadium
    • Parkerized Finish
    • 1:8 Twist
    • 15” LWKM Rail
    • .300 Blackout
    • 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 AR-15 Complete Upper Assembly 9MM, 16" 4150 Black Nitrite Barrel, 1:10 Twist, Standard Hand Guard w/ Gas Block
    BCA Complete Upper Assembly 9MM, 16" 4150 Black Nitride Barrel, 1:10 Twist, Standard Hand Guard w/ Gas Block
    Sku: UA9MMCM416110(M)-SHG(GB)
    Special Price $219.99 was $298.99

    SKU: UA9MMCM416110(M)-SHG(GB)

    • 16" Black Nitride 4150 Chrome Moly Vanadium Barrel w/ 1:10 Twist
    • Contour Barrel Profile
    • Standard Hand Guard
    • 9MM Caliber
    • Carbine Length Gas System
    • BCA Standard BCG with proprietary BCA AKM Bolt
    • Charging Handle
    • Bird Cage Flash Hider
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  3. BCA URSID HYBRID BEAR AR-15 Complete Upper Assembly, 16" 4150 Parkerized M4 Contour Barrel, .223 Wylde, 1:8 Twist w/ 15" Lightweight Keymod
    BCA URSID HYBRID BEAR AR-15 Complete Upper Assembly, 16" 4150 Parkerized M4 Contour Barrel, .223 Wylde, 1:8 Twist w/ 15" Lightweight Keymod
    Sku: UA223WCM41618(P)-(15)LWKM3
    Special Price $219.99 was $298.99

    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
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  4. BCA AR-15 Complete Upper Assembly, 16" 416R Stainless Heavy Barrel, 5.56 NATO, Mid Length Gas System, 1:8 Twist w/ 12" MLOK
    BCA AR-15 Complete Upper Assembly, 16" 416R Stainless M4 Contour Barrel, 5.56 NATO, Mid Length Gas System, 1:8 Twist w/ 12" MLOK
    Sku: UA556MM41618(SS)-(12)MLOK3
    Special Price $222.90 was $289.77

    SKU: UA556MM41618(SS)-(12)MLOK3

    • 16" M4 Contour Barrel
    • 416R Stainless Steel
    • Stainless Finish
    • 12" MLOK Rail
    • 5.56 NATO Caliber
    • Mid Length Gas System
    • M4 Flat Top Forged Upper Receiver
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  5. BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized Government Barrel, .223 Wylde, Carbine Length Gas System, 1:9 Twist w/ 12" MLOK
    BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized Government Barrel, .223 Wylde, Carbine Length Gas System, 1:9 Twist w/ 12" MLOK
    Sku: UA223WCGVNT1619(P)-(12)MLOK
    Special Price $223.90 was $291.07
    • 16" Government Barrel
    • 4150 Chrome Moly Vanadium Steel
    • Parkerized Finish
    • 1:9 Twist
    • 12" MLOK Rail
    • .223 Wylde Caliber
    • Carbine Length Gas System
    • M4 Flat Top Forged Upper Receiver
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  6. UA556CM41618-P-12-MLOK-WEBMAIN
    BCA AR-15 Complete Upper Assembly, 16" Parkerized 4150 Steel Contour Barrel, 5.56 NATO, 1:8 Twist, w/ MLOK
    Sku: 623-UA556CM41618P-12MLOK3
    Special Price $223.90 was $291.07

    SKU: 623-UA556CM41618P-12MLOK3

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:8 Twist
    • Contour Barrel Profile
    • 12" MLOK
    • 5.56 NATO Caliber
    • M4 Flat Top Upper Receiver
    • Carbine Length Gas System, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • Spiral Flash Hider
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  7. BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized Heavy Barrel, .223 Wylde, Carbine Length Gas System, 1:9 Twist w/ 12" MLOK
    BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized Heavy Barrel, .223 Wylde, Carbine Length Gas System, 1:9 Twist w/ 12" MLOK
    Sku: 609-UA223WCHB1619P-12MLOK3
    Special Price $223.90 was $291.07

    SKU: UA223WCHB1619(P)-(12)MLOK3

    • 16" Heavy Barrel
    • 4150 Chrome Moly Vanadium Steel
    • Parkerized Finish
    • 1:9 Twist
    • 12" MLOK Rail
    • .223 Wylde Caliber
    • Carbine Length Gas System
    • M4 Flat Top Forged Upper Receiver
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  8. BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized Heavy Barrel, 5.56 NATO, Carbine Length Gas System, 1:9 Twist w/ 12" MLOK
    BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized Heavy Barrel, 5.56 NATO, Carbine Length Gas System, 1:9 Twist w/ 12" MLOK
    Sku: 629-UA556CHB1619P-12MLOK3
    Special Price $223.90 was $291.07

    SKU: 629-UA556CHB1619P-12MLOK3

    • 16" Heavy Barrel
    • 4150 Chrome Moly Vanadium Steel
    • Parkerized Finish
    • 1:9 Twist
    • 12" MLOK Rail
    • 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
  9. 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
    Sku: 642-UA300CHB1618P.750-12LWKM3
    Special Price $223.90 was $291.07

    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
  10. UA9MMHB13-5110-M-10-MLOK2LS-WEBMAIN
    BCA Complete Upper Assembly: 13.5" 4150 Black Nitride Heavy Barrel, 9MM, 1:10 Twist w/ 10" MLOK
    Sku: UA9MMHB13.5110(M)-(10)MLOK3LS
    Special Price $223.99 was $291.19

    SKU: UA9MMHB13.5110(M)-(10)MLOK2LS

    • 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
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