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 Brown Bear AR-15 Complete Upper Assembly, 16" Parkerized 4150 Steel Contour Barrel, .223 Wylde, 1:9 Twist w/ Standard Hand Guard, A2 Front Sight
    BCA Brown Bear AR-15 Complete Upper Assembly, 16" Parkerized 4150 Steel Contour Barrel, .223 Wylde, 1:9 Twist w/ Standard Hand Guard, A2 Front Sight
    Special Price $199.99 was $319.99

    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
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  2. 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, .223 Wylde, Carbine Length Gas System, 1:9 Twist w/ 12" MLOK
    Special Price $209.90 was $399.99

    SKU: UA223WCHB1619(P)-(12)MLOK

    • 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
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  3. 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
    Special Price $219.90 was $349.99

    SKU: UA556MM41618(SS)-(12)MLOK

    • 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
  4. BCA AR-15 Complete Upper Assembly, 16" 4150 Black Nitride HeavyBarrel, 5.56 NATO, Carbine Length Gas System, 1:9 Twist Rate w/ 12" MLOK
    BCA AR-15 Complete Upper Assembly, 16" 4150 Black Nitride HeavyBarrel, 5.56 NATO, Carbine Length Gas System, 1:9 Twist Rate w/ 12" MLOK
    Special Price $237.38 was $409.99

    SKU: UA556CHB1619(M)-(12)MLOK

    • 16" Heavy Barrel
    • 4150 Chrome Moly Vanadium
    • Black Nitride Finish
    • 1:9 Twist Rate
    • 5.56 NATO Caliber
    • Carbine Length Gas System
    • M4 Flat Top Forged Upper Receiver
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
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  5. BCA AR-15 Complete Upper Assembly, 16" 4150 Steel Black Nitride Heavy Barrel, .223 Wylde, 1:9 Twist, Diamond Fluted w/ 12" M-LOK Rail
    BCA AR-15 Complete Upper Assembly, 16" 4150 Steel Black Nitride Heavy Barrel, .223 Wylde, 1:9 Twist, Diamond Fluted w/ 12" M-LOK Rail
    Special Price $291.48 was $394.99

    SKU:UA223WCHB1619(MFC)-(12)MLOK

    • 16" Black Nitirde 4150 Chrome Moly Vanadium Barrel
    • Heavy Barrel Profile
    • 1:9 Twist
    • Diamond Fluted w/ 12" MLOK
    • .223 WYLDE Caliber
    • Carbine Length Gas System
    • BCA Standard BCG
    • Charging Handle
    Learn More
  6. BCA AR-15 COMPLETE UPPER ASSEMBLY, 16" PARKERIZED 4150 STEEL HEAVY BARREL, DIAMOND FLUTED, .223 WYLDE, CARBINE LENGTH GAS SYSTEM, 1:8 TWIST W/ 12" MLOK RAIL
    BCA AR-15 Complete Upper Assembly, 16" Parkerized 4150 Steel Heavy Barrel, Diamond Fluted, .223 Wylde, Carbine Length Gas System, 1:8 Twist w/ 12" MLOK Rail
    Special Price $283.68 was $384.99

    SKU: UA223WCHB1618(PFC)-(12)MLOK

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel
    • Heavy Barrel Profile
    • 1:8 Twist
    • Diamond Fluted
    • .223 WYLDE Caliber
    • Carbine Length Gas System
    • 12" MLOK Rail
    • BCA Standard BCG
    • Charging Handle
    Learn More
  7. BCA AR-15 COMPLETE UPPER ASSEMBLY, 16" 4150 STEEL PARKERIZED HEAVY BARREL, .223 WYLDE, 1:9 TWIST, DIAMOND FLUTED W/ 12" M-LOK RAIL
    BCA AR-15 Complete Upper Assembly, 16" 4150 Steel Parkerized Heavy Barrel, .223 Wylde, 1:9 Twist, Diamond Fluted w/ 12" M-LOK Rail
    Special Price $269.49 was $384.99

    SKU:UA223WCHB1619(PFC)-(12)MLOK

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel
    • Heavy Barrel Profile
    • 1:9 Twist
    • Diamond Fluted w/ 12" MLOK
    • .223 WYLDE Caliber
    • Carbine Length Gas System
    • BCA Standard BCG
    • Charging Handle
    Learn More
  8. BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized Heavy Barrel, .458 Socom, Carbine Length Gas System, 1:14 Twist w/ 15" MLOK
    BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized Heavy Barrel, .458 Socom, Carbine Length Gas System, 1:14 Twist w/ 15" MLOK
    Special Price $293.88 was $359.99

    SKU: UA458CHB16114(P).875-(15)MLOK

    • 16" 4150 Chrome Moly Vanadium Steel Barrel
    • Heavy Barrel Profile
    • 1:14 Twist Rate
    • Carbine Length Gas System
    • .875 Gas Block System
    • .125 Gas Hole Diameter
    • 15" MLOK Rail
    • .458 SOCOM Caliber
    • M4 Flat Top Forged Upper Receiver w/ Forward Assist
    • Proprietary Bolt Carrier Group
    • Charging Handles
    • Birdcage Flash Hider
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  9. BCA AR-15 Complete Upper Assembly, 18" 4150 Parkerized Heavy Barrel, .450 Bushmaster, Mid Length Gas System, 1:24 Twist w/ 15" MLOK
    BCA AR-15 Complete Upper Assembly, 18" 4150 Parkerized Heavy Barrel, .450 Bushmaster, Mid Length Gas System, 1:24 Twist w/ 15" MLOK
    Special Price $293.40 was $361.99

    SKU: UA450MHB18124(P)-(15)MLOK

    • 18" 4150 Chrome Moly Vanadium Steel Barrel
    • Heavy Barrel Profile
    • 1:24 Twist Rate
    • Mid Length Gas System
    • .750 Gas Block System
    • .089 Gas Hole Diameter
    • 15" MLOK Rail
    • .450 Bushmaster Caliber
    • M4 Flat Top Forged Upper Receiver w/ Forward Assist
    • Bolt Carrier Group
    • Charging Handles
    • Birdcage Flash Hider
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  10. BCA AR-10 Complete Upper Assembly, 20" Parkerized 4150 Steel Heavy Barrel, .243 Winchester, 1:8 Twist, Rifle Length Gas System w/ 15" Lightweight Keymod Rail
    BCA AR-10 Complete Upper Assembly, 20" Parkerized 4150 Steel Heavy Barrel, .243 Winchester, 1:8 Twist, Rifle Length Gas System w/ 15" Lightweight Keymod Rail
    Special Price $335.38 was $379.99

    SKU: UA243RHB2018(P)-(15)LWKM

    • 20" 4150 Parkerized Barrel w/ 1:8 Twist
    • SHeavy Barrel Profile
    • 15" Lightweight Keymod
    • .243 Caliber
    • M4 Flat Top Upper Receiver
    • Rifle Length Gas System,
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
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