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Bear Creek .350 Legend 20" Stainless Heavy Barrel 1:16 Carbine 15" MLOK Rail Side Charging Upper Gen 2
Bear Creek .350 Legend 20' Stainless Heavy Barrel 1:16 Carbine 15' MLOK Rail Side Charging Upper Gen 2

Bear Creek .350 Legend 20" Stainless Heavy Barrel 1:16 Carbine 15" MLOK Rail Side Charging Upper Gen 2

Part Number:558-UASCH350LCHB20116SS-15M3
On sale: $469.95
Retail Price:$499.95
You Save:$30.00(6%)
In Stock.

Choose Options

Add MLOK QD Sling Swivel [+$19.95]
Add One 5 Slot MLOK Rail [+$8.95]
Add Two 5 Slot MLOK Rail [+$17.50]
Add Three 5 Slot MLOK Rail [+$25.50]
Bear Creek Arsenal .350 Legend, 20" Stainless Heavy Barrel, 1:16 Twist, Carbine Length Gas System, 15" MLOK Rail|Side Charging Upper (Gen 2) 

350 Legend is a low recoil, straight wall cartridge that is effective for hunting deer, mountain lions, and wild boar. This complete upper assembly will make the perfect hunting rifle or plinker to add to your arsenal. Side charging AR-15s also have many advantages including being easier to use with scopes and improved ergonomics. Bear Creek Arsenal side charging uppers are made from 7075 aircraft-grade aluminum billets.

This BCA AR-15 complete 350 Legend rifle length upper has a 20" heavy barrel with a stainless finish, and features a 1:16 twist rate, with a carbine length gas system. It includes a 15 1/4" MLOK rail, an M4 flat-top billet upper receiver, a BCA bolt carrier group, a flash hider, and a side charging (Gen 2) handle (patent pending). This 350 Legend upper is compatible with any mil-spec AR-15 lower.

Bear Creek Arsenal manufactures all AR-15 rifles, complete upper assemblies, barrels, bolt carrier groups (bcg), and components in-house here in Sanford, NC. Choose an American-made AR-15 complete upper assembly from Bear Creek Arsenal, designed for high accuracy and backed by a lifetime warranty. Bear Creek recommends ASC magazines and Hornady American Whitetail 170 gr. and Winchester FMJ 145gr.


  • 20" Heavy Barrel
  • 416R Stainless Steel
  • 1:16 Twist
  • Weight 5.75lbs
  • 15" MLOK Rail
  • .350 Legend Caliber
  • Forged Upper Receiver
  • Carbine Length Gas Block, .750 Diameter Gas Block
  • Charging Handle INCLUDED
  • BCA Spiral Hider
  • 5/8 x 24 Thread Barrel
  • Right Side Charger
  • Gas Hole Diameter 0.1015

The BCA AR-15 300blk Complete Rifle Upper Assembly has a 16" heavy barrel made of 4150 chrome moly vanadium steel with a parkerized finish, a 1:8 twist rate and a carbine length gas system. The assembly includes a 12" m-lok rail, an m4 flat top forged upper receiver, a BCA bolt carrier group, BCA Spiral flash hider and a charging handle. It is chambered in .300 blackout and machined with .300 blackout feed ramps in the barrel extension.

The BCA AR-15 Complete Upper Assembly, like all BCA products, is subjected to numerous QA/QC checks which for our firearms and upper receiver assemblies includes test firing prior to approval and shipment. This upper assembly is also backed by our BCA limited lifetime warranty. Choose an upper assembly designed by a U.S. company and made in the U.S.A. Choose BCA.

ProfileHeavy Barrel
Material4150 Chrome Moly Vanadium
Thread Pitch5/8 x 24
Caliber.300 Blackout
Feed RampM4
Gas SystemCarbine
Gas Block System0.750
Charging StyleRear Charging

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