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.

View as List Grid

115 items

per page
Set Descending Direction
  1. 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 $199.90 was $319.99

    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
  2. 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 $199.90 was $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
  3. 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 $199.90 was $319.99

    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
  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, Spiral Flash Hider
    Sku: 689-UA762CHB16110P-SHGFSLS
    Special Price $199.90 was $319.99

    SKU: UA762CHB16110(P)-SHG(FS)LS

    • 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 Standard BCA Bolt
    • Charging Handle
    • BCA Spiral Flash Hider
    Learn More
  5. 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 $199.90 was $319.99

    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
  6. 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 $199.90 was $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
  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
    Sku: 600-UA223WCM41619P-SHGFS
    Special Price $199.90 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" 4150 Parkerized Contour Barrel, 5.56 NATO, Carbine Length Gas System, 1:7 Twist w/ 12" MLOK
    BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized Contour Barrel, 5.56 NATO, Mid Length Gas System, 1:7 Twist w/ 12" MLOK
    Sku: 624-UA556MM41617P-12MLOK2
    Special Price $204.90 was $344.99

    SKU: UA556MM41617(P)-(12)MLOK2

    • 16" Contour Barrel
    • 4150 Chrome Moly Vanadium Steel
    • Parkerized Finish
    • 1:7 Twist
    • 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
  9. BCA Andean Bear AR-15 Complete Upper Assembly, 16" 4150 Parkerized 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" 4150 Parkerized M4 Contour Barrel, 5.56 NATO, Mid Length Gas System, 1:7 Twist w/ 15" Lightweight Keymod
    Sku: 626-UA556MM41617P-15LWKM
    Special Price $206.06 was $349.99

    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
  10. 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)MLOK
    Special Price $208.91 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
View as List Grid

115 items

per page
Set Descending Direction