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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 86 total

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  1. BCA AR-15 Complete Pistol Upper Assembly, 10.5" 4150 Parkerized Heavy Barrel, .300 Blackout, Pistol Length Gas System, 1:8 Twist w/ 10" MLOK

    BCA AR-15 Complete Pistol Upper Assembly, 10.5" 4150 Parkerized Heavy Barrel, .300 Blackout, Pistol Length Gas System, 1:8 Twist w/ 10" MLOK

    $342.99

    SKU: UA300PHB10.518(P)-(10)MLOK

    • 10.5" Heavy Barrel
    • 4150 Chrome Moly Vanadium Steel
    • 1:8 Twist
    • Parkerized Finish
    • 10" MLOK 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
  2. 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

    $347.99

    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
  3. BCA AR-15 Complete Pistol Upper Assembly, 10.5" 4150 Parkerized M4 Contour Barrel, 5.56 NATO, Carbine 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, Carbine Length Gas System, 1:7 Twist w/ 10" Lightweight Keymod Rail

    $342.99

    Out of stock

    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
  4. 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

    Special Price $239.90

    (Was $319.99 )

    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
  5. BCA AR-15 Complete Upper Assembly, 16" 416R Stainless Steel Black Nitride Heavy Barrel, .223 Wylde, 1:8 Twist, Bear Claw Fluted w/ 10" M-LOK Rail

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

    $408.99

    SKU: UA223WCHB1618(SSBCF)-(10)MLOK

    • 16" 416R Stainless Steel Barrel w/ Black Nitride Finish
    • Heavy Barrel Profile
    • 1:8 Twist
    • Bear Claw Flutes
    • 10" MLOK
    • .223 Wylde Caliber
    • Carbine Length Gas System
    Learn More
  6. BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized Contour Barrel, 6.5 Grendel, Carbine length gas system, 1:8 Twist w/ 15" M-LOK

    BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized Contour Barrel, 6.5 Grendel, Carbine length gas system, 1:8 Twist w/ 15" M-LOK

    Special Price $289.90

    (Was $359.99 )

    SKU: UA6.5CM41618(P)-(15)MLOK

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:8 Twist
    • Contour Barrel Profile
    • 15" Keymod Rail
    • 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
  7. 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 $239.90

    (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
    Learn More
  8. 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

    $384.99

    Out of stock

    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
  9. 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

    $319.99

    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
  10. BCA URSID HYBRID BEAR AR-15 Complete Upper Assembly, 16" 416R Stainless M4 Contour Barrel, .223 Wylde, Carbine Length Gas System, 1:8 Twist w/ 15" Lightweight Keymod

    BCA URSID HYBRID BEAR AR-15 Complete Upper Assembly, 16" 416R Stainless M4 Contour Barrel, .223 Wylde, Carbine Length Gas System, 1:8 Twist w/ 15" Lightweight Keymod

    $354.99

    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
  11. BCA Andean Bear AR-15 Complete Upper Assembly, 16" 416R Stainless M4 Contour Barrel, 5.56 NATO, Mid Length Gas System, 1:7 Twist w/ 15" Lightweight Keymod

    BCA Andean Bear AR-15 Complete Upper Assembly, 16" 416R Stainless M4 Contour Barrel, 5.56 NATO, Mid Length Gas System, 1:7 Twist w/ 15" Lightweight Keymod

    $354.99

    Out of stock

    SKU: UA556MM41617(SS)-(15)LWKM

    • 16" 416R Stainless Steel Barrel w/ 1:7 Twist
    • M4 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
  12. BCA 16"416R STAINLESS STEEL 7.62X39 1:10 TWIST W/ FRONT SIGHT AR-15 COMPLETE UPPER ASSEMBLY

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

    $334.99

    SKU: UA762CHB16110(SS)-SHG(FS)

    • 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
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  13. BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized Contour Barrel, 5.56 NATO, Mid Length Gas System, 1:7 Twist w/ 15" MLOK

    BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized Contour Barrel, 5.56 NATO, Mid Length Gas System, 1:7 Twist w/ 15" MLOK

    $349.99

    SKU: UA556MM41617(P)-(15)MLOK

    • 16" M4 Contour Barrel
    • 4150 Chrome Moly Vanadium
    • Parkerized Finish
    • 1:7 Twist
    • 15" MLOK
    • 5.56 NATO Caliber
    • M4 Flat Top Upper Receiver
    • Mid Length Gas System,
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  14. BCA Branded 16" 6.5 Grendel Type II AR-15 Complete Upper Assembly

    BCA AR-15 Complete Upper Assembly: 16" 4150 Black Nitride Contour, 6.5 Grendel Type II, Carbine Length Gas System, 1:8 Twist, Standard Hand Guard, Front Sight

    Special Price $274.90

    (Was $339.99 )

    SKU: UA6.5CM41618(M)-SHG(FS)

    • 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
  15. 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

    $359.99

    Out of stock

    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
    Learn More
  16. 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

    $344.99

    SKU: UA556CHB1619(P)-(12)MLOK

    • 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
  17. THE DUAL CHARGING BCA BROWN BEAR 16" 4150 PARKERIZED .223 WYLDE 1:9 TWIST W/ FRONT SIGHT AR-15 COMPLETE UPPER ASSEMBLY

    The Dual Charging BCA Brown Bear 16" 4150 Parkerized .223 WYLDE 1:9 twist w/ Front Sight AR-15 Complete Upper Assembly

    $364.99

    SKU: UADC223WCM41619(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
    • Carbine Length Gas System, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  18. BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized Heavy Barrel, .450 Bushmaster, Carbine Length Gas System, 1:24 Twist w/ 12" MLOK

    BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized Heavy Barrel, .450 Bushmaster, Carbine Length Gas System, 1:24 Twist w/ 12" MLOK

    $354.99

    SKU: UA450CHB16124(P)-(12)MLOK

    • 16" 4150 Chrome Moly Vanadium Steel Barrel
    • Heavy Barrel Profile
    • 1:24 Twist Rate
    • Carbine Length Gas System
    • .750 Gas Block System
    • .070 Gas Hole Diameter
    • 12" MLOK Rail
    • .450 Bushmaster Caliber
    • M4 Flat Top Forged Upper Receiver w/ Forward Assist
    • Proprietary Bolt Carrier Group
    • Charging Handles
    • Birdcage Flash Hider
    Learn More
  19. BCA AR-15 Complete Upper Assembly, 16" Heavy Barrel, Olive Darb Cerakote, .233 Wylde caliber, Carbine Length Gas System, 1:8 Twist w/ 12" MLOK

    BCA AR-15 Complete Upper Assembly, 16" Heavy Barrel, Olive Drab Cerakote, .223 Wylde caliber, Carbine Length Gas System, 1:8 Twist w/ 12" MLOK

    $384.99

    SKU: UA223WCHB1618(MNY)-(OD)12MLOK

    • 16" 4150 Chrome Moly Vanadium Steel Barrel
    • Heavy Barrel Profile
    • 1:8 Twist Rate
    • Carbine Length Gas System
    • .750 Gas Block System
    • .070 Gas Hole Diameter
    • 12" MLOK Rail
    • .223 Wylde Caliber
    • M4 Flat Top Forged Upper Receiver w/ Forward Assist
    • Proprietary Bolt Carrier Group
    • Charging Handles
    • Birdcage Flash Hider
    • Olive Drab Cerakote
    Learn More
  20. 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

    $319.99

    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
  21. 300 blackout 16" Barrel 12" Lightweight Keymod BCA Upper Assembly

    BCA AR-15 Complete Upper Assembly, 16" Parkerized 4150 Heavy Barrel, .300 Blackout, 1:8 Twist, w/ 15" Lightweight Keymod Rail, .750 Gas Block Diameter

    $349.99

    SKU: UA300CHB1618(P).750-(15)LWKM

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:8 Twist
    • Heavy Barrel Profile
    • 15" 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
  22. UA556CM41619(SS)-(15)MLOK-WEBMAIN

    BCA AR-15 Complete Upper Assembly, 16" 416R Stainless Steel M4 Contour Barrel, 5.56 NATO, 1:9 Twist, w/ 15" MLOK Rail

    $354.99

    SKU:UA556CM41619(SS)-(15)MLOK

    • 16" 416R Stainless Steel Barrel w/ 1:9 Twist
    • M4 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 AR-15 Complete Upper Assembly 7.62x39, 16" 4150 Parkerized Barrel, 1:10 Twist w/ 10" Free Floating Quad Rail

    BCA AR-15 Complete Upper Assembly 7.62x39, 16" 4150 Parkerized Barrel, 1:10 Twist w/ 10" Free Floating Quad Rail

    $344.99

    SKU: UA762CHB16110(P)-(10)FFQ

    • 16" 4150 Parkerized Barrel w/ 1:10 Twist
    • Heavy Barrel Profile
    • Free Floating Quad Rail
    • 7.62x39 Caliber
    • M4 Flat Top Upper Receiver
    • Carbine Length Gas System
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  24. 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

    Special Price $279.90

    (Was $349.99 )

    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
  25. BCA AR-15 Complete Upper Assembly, 16" 416R Stainless Black Nitride Heavy Barrel, Bear Claw Fluted, .223 Wylde, Carbine Length Gas System, 1:8 Twist w/ 12" MLOK Rail

    BCA AR-15 Complete Upper Assembly, 16" 416R Stainless Black Nitride Heavy Barrel, Bear Claw Fluted, .223 Wylde, Carbine Length Gas System, 1:8 Twist w/ 12" MLOK Rail

    $403.99

    SKU: UA223WCHB1618(SSBCF)-(12)MLOK

    • 16" 416R Stainless Steel Barrel w/ Black Nitride Finish
    • Heavy Barrel Profile
    • 1:8 Twist
    • Bear Claw Flutes
    • 12" MLOK Rail
    • .223 Wylde Caliber
    • Carbine Length Gas System
    • BCA Standard BCG
    • Charging Handle
    Learn More

Items 1 to 25 of 86 total

per page
Page:
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