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 AR-15 Half Upper Assembly, 16" 416R Stainless Steel M4 Contour Barrel, 5.56 NATO, 1:9 Twist w/ 15" M-LOK Rail
    BCA AR-15 Half Upper Assembly, 16" 416R Stainless Steel M4 Contour Barrel, 5.56 NATO, 1:9 Twist w/ 15" M-LOK Rail
    Sku: UHA556CM41619(SS)-(15)MLOK3
    Special Price $169.90 was $220.87
    • 16" Contour Barrel
    • 416R Stainless Steel
    • Stainless Steel Finish
    • 1:9 Twist
    • 15" MLOK Rail
    • 5.56 NATO Caliber
    • Carbine Length Gas System
    • M4 Flat Top Upper Receiver
    • Bird Cage Flash Hider
    Learn More
  2. BCA AR-15 Complete Upper Assembly, 7.5" Parkerized 4150 Steel Heavy Barrel, .300 Blackout, 1:8 Twist w/ 7" MLOK
    BCA AR-15 Complete Upper Assembly, 7.5" Parkerized 4150 Steel Heavy Barrel, .300 Blackout, 1:8 Twist w/ 7" MLOK
    Sku: UA300PHB7.518(P)-(7)MLOK3
    Special Price $189.90 was $246.87

    SKU: UA300PHB7.518(P)-(7)MLOK

    • 7.5" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:8 Twist
    • Heavy Barrel Profile
    • 7" MLOK
    • .300 Blackout Chamber
    • M4 Flat Top Upper Receiver
    • Pistol Length Gas System, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  3. UA556PM47.517(P)-(7)MLOK WEBMAIN
    BCA AR-15 Complete Pistol Upper Assembly: 7.5" 4150 Parkerized M4 Contour Barrel, 5.56 NATO, Pistol Length Gas System, 1:7 Twist w/ 7" Lightweight Mlok
    Sku: 621-UA556PM47.517P-7MLOK3
    Special Price $189.90 was $246.87

    SKU: UA556PM47.517(P)-(7)MLOK

    • 7.5" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:7 Twist
    • M4 Contour Barrel Profile
    • 7" Mlok Rail
    • 5.56 NATO Caliber
    • Forged Upper Receiver
    • Rear Charging
    • Pistol Length Gas System, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  4. BCA 300 BLACKOUT 7" FREE FLOATING QUAD RAIL COMPLETE UPPER
    BCA AR-15 Complete Pistol Upper Assembly, 7.5" Parkerized 4150 Steel Heavy Barrel, .300 Blackout, 1:7 Twist w/ 7" Free Floating Quad Rail
    Sku: UA300PHB7.517(P)-(7)FFQ
    Special Price $189.90 was $246.87

    SKU: UA300PHB7.517(P)-(7)FFQ

    • 7.5" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:7 Twist
    • Heavy Barrel Profile
    • 7" Quad Rail
    • .300 Blackout Caliber
    • M4 Flat Top Upper Receiver
    • Pistol Length Gas System, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  5. BCA AR-15 Complete Pistol Upper Assembly: 7.5" 4150 Parkerized M4 Contour Barrel, 5.56 NATO, Pistol Length Gas System, 1:7 Twist w/ 7" Lightweight Keymod
    BCA AR-15 Complete Pistol Upper Assembly: 7.5" 4150 Parkerized M4 Contour Barrel, 5.56 NATO, Pistol Length Gas System, 1:7 Twist w/ 7" Lightweight Keymod
    Sku: 619-UA556PM47.517P-7LWKM3
    Special Price $189.90 was $246.87

    SKU: UA556PM47.517(P)-(7)LWKM

    • 7.5" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:7 Twist
    • M4 Contour Barrel Profile
    • 7" Keymod Rail
    • 5.56 NATO Caliber
    • Forged Upper Receiver
    • Rear Charging
    • Pistol Length Gas System, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  6. PISTOL UPPER ASSEMBLY 7.5'' 1/7 TWIST (FREE FLOAT) STAINLESS STEEL
    BCA AR-15 Complete Pistol Upper Assembly, 7.5" 416R Stainless Steel Barrel, .223 Wylde, Pistol Length Gas System 1:7 Twist w/ 7" Free Floating Quad Rail
    Sku: UA223WPM47.517(SS)-(7)FFQ
    Special Price $194.90 was $253.37

    SKU: UA223WPM47.517(SS)-(7)FFQ

    • 7.5" 416R Stainless Steel Barrel w/ 1:7 Twist
    • M4 Contour Barrel Profile
    • 7" Free Float Quad Rail
    • .223 Wylde Caliber
    • Rear Charging
    • Forged Upper Receiver
    • Pistol Length Gas System, .750 Diameter Gas Block
    • BCA Standard BCG
    • Charging Handle
    • Bird Cage Flash Hider
    Learn More
  7. BCA AR-15 Complete Upper, 10.5” 4150 Parkerized M4 Contour Barrel, 5.56 NATO, Carbine Length Gas System, 1:8 Twist w/ 10” LWKM Rail
    BCA AR-15 Complete Upper, 10.5” 4150 Parkerized M4 Contour Barrel, 5.56 NATO, Carbine Length Gas System, 1:8 Twist w/ 10” LWKM Rail
    Sku: 622-UA556CM410.518P-10LWKM3
    Special Price $199.90 was $259.87
    • 10.5” M4 Contour Barrel
    • 4150 Chrome Moly Vanadium
    • Parkerized Finish
    • 1:8 Twist
    • 10” Lightweight Keymod Rail
    • 5.56 NATO
    • Carbine Length Gas System
    • M4 Flat-Top Forged Upper Receiver
    • Standard Bear Creek Arsenal Bolt Carrier Group
    • Charging Handle
    • LS2 Flash Hider
    Learn More
  8. 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
    Sku: UA556CM410.517(P)-(10)LWKM3
    Special Price $199.90 was $259.87

    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
  9. BCA Kodiak II AR-15 Complete Upper Assembly, 5.56 NATO, 16" 4150 Parkerized barrel, 1:7 Twist w/ 10" Free Floating Quad Rail
    BCA Kodiak II AR-15 Complete Upper Assembly, 5.56 NATO, 16" 4150 Parkerized barrel, 1:7 Twist w/ 10" Free Floating Quad Rail
    Sku: UA556MM41617(P)-(10)FFQ
    Special Price $199.90 was $259.87

    SKU: UA556MM41617(P)-(10)FFQ

    • 16" Parkerized 4150 Chrome Moly Vanadium Barrel w/ 1:7 Twist
    • Contour Barrel Profile
    • 10" Quad 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, 5.56 NATO, 16" 4150 Black Nitride barrel, 1:7 Twist, Standard Hand Guard w/ Gas Block
    BCA AR-15 Complete Upper Assembly, 16" Black Nitride 4150 Steel Contour Barrel, 5.56 NATO, 1:7 Twist, w/ Standard Hand Guard, Gas Block
    Sku: UA556CM41617(M)-SHG(GB)
    Special Price $209.90 was $272.87

    SKU: UA556CM41617(M)-SHG(GB)

    • 16" Black nitride 4150 Chrome Moly Vanadium Barrel w/ 1:7 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
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