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

176 items

per page
Set Descending Direction
  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
    Sku: 600-UA223WCM41619P-SHGFS
    Special Price $209.90 was $272.87

    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
  2. BCA AR-15 Complete Upper Assembly 16” 4150 Parkerized Heavy Barrel, .300 Blackout, Carbine Length Gas System, 1:8 Twist w/ 15” MLOK Rail
    BCA AR-15 Complete Upper Assembly 16” 4150 Parkerized Heavy Barrel, .300 Blackout, Carbine Length Gas System, 1:8 Twist w/ 15” MLOK Rail
    Sku: 635-UA300CHB1618P-15MLOK3
    Special Price $209.99 was $285.87

    635-UA300CHB1618P-15MLOK

    • 16” Heavy Barrel 
    • 4150 Chrome Moly Vanadium  
    • Parkerized Finish
    • 1:8 Twist
    • 15” MLOK Rail   
    • .300 Blackout Caliber
    • Standard BCA BCG
    • Carbine Length Gas System
    • M4 Flat-Top Forged Upper Receiver    
    • Standard Bear Creek Arsenal Bolt Carrier Group
    • Charging Handle
    Learn More
  3. BCA AR-15 Complete Pistol Upper Assembly, 10.5" 4150 Parkerized Heavy Barrel, .300 Blackout, Pistol Length Gas System, 1:7 Twist w/ 7" Free Float Quad Rail
    BCA AR-15 Complete Pistol Upper Assembly, 10.5" 4150 Parkerized Heavy Barrel, .300 Blackout, Pistol Length Gas System, 1:7 Twist w/ 7" Free Float Quad Rail
    Sku: UA300PHB10.517(P)-(7)FFQ
    Special Price $213.90 was $278.07
    • 10.5" Heavy Barrel
    • 4150 Chrome Moly Vanadium Steel
    • 1:7 Twist
    • Parkerized Finish
    • 7" Free Float Quad Rail
    • .300 Blackout Caliber
    • Forged Upper Receiver
    • Pistol Length Gas Block, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • BCA Spiral Hider
    Learn More
  4. BCA AR-15 Complete Pistol Upper Assembly, 10.5" 4150 Parkerized Heavy Barrel, .300 Blackout, Pistol Length Gas System, 1:7 Twist w/ 10" Lightweight Keymod Rail
    BCA AR-15 Complete Pistol Upper Assembly, 10.5" 4150 Parkerized Heavy Barrel, .300 Blackout, Pistol Length Gas System, 1:7 Twist w/ 10" Lightweight Keymod Rail
    Sku: UA300PHB10.517(P)-(10)LWKM3
    Special Price $213.90 was $278.07
    • 10.5" Heavy Barrel
    • 4150 Chrome Moly Vanadium Steel
    • 1:7 Twist
    • Parkerized Finish
    • 10" Lightweight Keymod Rail
    • .300 Blackout Caliber
    • Forged Upper Receiver
    • Pistol Length Gas Block, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • BCA Spiral Hider
    Learn More
  5. 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, Spiral Flash Hider
    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, Spiral Flash Hider
    Sku: UA300PHB10.518(P)-(10)MLOK3LS
    Special Price $213.90 was $278.07
    SKU: UA300PHB10.518(P)-(10)MLOK3LS

    • 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
    • BCA Spiral Hider
    Learn More
  6. 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
    Sku: 636-UA300PHB10.518P-10MLOK3
    Special Price $213.90 was $278.07
    • 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
  7. BCA 16" 416R Stainless Steel .223 WYLDE 1:9 Twist w/ Gas Block AR-15 Complete Upper Assembly
    BCA AR-15 Complete Upper Assembly, 16" 416R Stainless Steel Contour Barrel, .223 Wylde, 1:9 Twist w/ Standard Hand Guard, Gas Block
    Sku: UA223WCM41619(SS)-SHG(GB)
    Special Price $214.90 was $279.37

    SKU: UA223WCM41619(SS)-SHG(GB)

    • 16" 416R Stainless Steel 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
  8. BCA 16" 416R Stainless Steel 5.56 NATO 1:9 Twist w/ Front Sight AR-15 Complete Upper Assembly
    BCA AR-15 Complete Upper Assembly: 16" 416R Stainless Steel Contour Barrel, 5.56 NATO, 1:9 Twist, Standard Hand Guard w/ Front Sight
    Sku: UA556CM41619(SS)-SHG(FS)
    Special Price $214.90 was $279.37

    SKU: UA556CM41619(SS)-SHG(FS)

    • 16" 416R Stainless Steel 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. UA556RHB2017(M)-(15)MLOK-WEBMAIN
    BCA AR-15 Complete Upper Assembly 5.56 NATO, 20" 4150 Melonited Heavy Barrel, 1:7 Twist w/ 15" M-LOK
    Sku: UA556RHB2017(M)-(15)MLOK3LS
    Special Price $214.99 was $369.99

    SKU: UA556RHB2017(M)-(15)MLOK3LS

    • 20" 4150 Melonite Barrel w/ 1:7 Twist
    • Heavy Barrel Profile
    • MLOK
    • 5.56 NATO Caliber
    • M4 Flat Top Upper Receiver
    • Rifle Length Gas System,
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  10. BCA AR-15 Complete Upper Assembly, 16" Parkerized 4150 Steel Mid Weight Barrel, .223 Wylde,  1:8 Twist w/ 12" M-LOK Rail
    BCA AR-15 Complete Upper Assembly, 16" Parkerized 4150 Steel Mid Weight Barrel, .223 Wylde, 1:8 Twist w/ 12" M-LOK Rail
    Sku: UA223WMMW1618(P)-(12)MLOK3
    Special Price $217.90 was $283.27

    SKU: UA223WMMW1618(P)-(12)MLOK3

    • 16" 416R Stainless Steel Barrel w/ 1:8 Twist
    • Mid Weight Barrel Profile
    • 12" MLOK
    • .223 Wylde Caliber
    • M4 Flat Top Upper Receiver
    • Mid Length Gas System,
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
View as List Grid

176 items

per page
Set Descending Direction