NBS 7.62x39, 10.5" Parkerized Heavy Barrel, 1:10 Twist, Carbine Length Gas System, 10" MLOK Rail Sporter Upper

This Bear Creek Arsenal AR-15 Complete 7.62×39 Slick Side pistol length upper has a 10.5″ heavy barrel with a parkerized finish, and features a 1:10 twist rate, with a Carbine length gas system. It includes a 10 5/16″ MLOK rail, a M4 flat-top 7075 billet aluminum upper receiver, a BCA Bolt Carrier Group, Flash Hider, and a rear charging handle. This 7.62×39 upper is compatible with any mil-spec AR-15 lower. This Slick Side upper has no forward assist or dust cover.

Featuring a 7.62×39 enhanced firing pin for increased reliability for steel cased ammo and upgraded bolt.

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.

We recommend ASC magazines and Wolf 122gr. (Winchester 123gr., American Eagle 124 gr.) ammo.

Specifications:

• Weight: 4.0
• Length: 10.5″
• Profile: Heavy Barrel
• Twist: 1:10
• Finish: Parkerized
• Material: 4150 Chrome Moly Vanadium
• Thread Pitch: 5/8 x 24
• Caliber: 7.62×39
• Feed Ramp: .300 Blackout
• Flutes: None
• Gas System: Carbine
• Gas Block System: 0.750
• Gas Hole Diameter: 0.093
• Charging Style: Slick Side Rear Charging
• Classification: Complete Upper Assembly
• Platform: AR-15
• Threaded: Threaded