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 Side Charging AR-15 Complete Upper Assembly, 5.56 NATO, 10.5" 416R Stainless steel, Parkerized Barrel, 1:7 Twist with Light Weight KeyMod
    BCA Side Charging AR-15 Complete Upper Assembly, 5.56 NATO, 10.5" 416R Stainless steel, Parkerized Barrel, 1:7 Twist with Light Weight KeyMod
    Sku: UASC556CM410.517(P)-(10)LWKM
    Special Price $209.90 was $325.99

    SKU: UASC556CM410.517(P)-(10)LWKM

    • 10.5" 416R Stainless Steel Barrel w/ 1:7 Twist
    • Parkerized
    • 5.56 NATO Caliber
    • M4 Flat Top Upper Receiver
    • Carbine Length Gas System, .750 Diameter Gas Block
    • BCA Standard BCG
    • Side Charging
    • Bird Cage Flash Hider
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  2. UA223WRHB2019-SS-17-LWKM-WEBMAIN
    BCA AR-15 Complete Upper Assembly, 20" 416R Stainless Heavy Barrel, .223 Wylde, Rifle Length Gas System, 1:9 Twist w/ 17" Lightweight Keymod
    Sku: UA223WRHB2019(SS)-(17)LWKM
    Special Price $209.90 was $374.99

    SKU: UA223WRHB2019(SS)-(17)LWKM

    • 20" Heavy Barrel
    • 416R Stainless Steel
    • Stainless Finish
    • 1:9 Twist
    • 17" LWKM Rail
    • .223 Wylde Caliber
    • Rifle Length Gas System
    • M4 Flat Top Forged Upper Receiver
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
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  3. UA223WCHB1618(MNY)-(OD)12MLOK-WEBMAIN-FRONT
    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
    Sku: UA223WCHB1618(MNY)-(OD)12MLOK
    Special Price $209.90 was $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
    • Standard BCA Bolt Carrier Group
    • Charging Handle
    • Olive Drab Cerakote
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  4. BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized M4 Contour Barrel, .223 Wylde, Carbine Length Gas System, 1:7 Twist w/ 15 MLOK
    BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized M4 Contour Barrel, .223 Wylde, Carbine Length Gas System, 1:7 Twist w/ 15 MLOK
    Sku: 601-UA223WCM41617P-15MLOK2
    Special Price $209.90 was $349.99

    SKU: UA223WCM41617(P)-(15)MLOK

    • 16" M4 Contour Barrel
    • 4150 Chrome Moly Vanadium
    • Parkerized Finish
    • 1:7 Twist
    • 15" 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
  5. 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-12MLOK
    Special Price $209.90 was $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
  6.  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
    Sku: 606-UA223WCHB1619PFC-12MLOK
    Special Price $209.90 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
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  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 $209.90 was $334.99

    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 AR-15 Complete Upper Assembly, 16" 4150 Parkerized M4 Contour Barrel, .300 Blackout, Carbine Length Gas System, 1:7 Twist w/ 15" MLOK
    BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized M4 Contour Barrel, .300 Blackout, Carbine Length Gas System, 1:7 Twist w/ 15" MLOK
    Sku: 641-UA300CM41617P-15MLOK2
    Special Price $209.90 was $349.99

    SKU: UA300CM41617(P)-(15)MLOK2

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:7 Twist
    • Contour Barrel Profile
    • .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
  9. 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
    Sku: UA300CHB1618(P).750-(15)LWKM
    Special Price $209.90 was $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
  10. 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.750-12LWKM
    Special Price $209.90 was $344.99

    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
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