AR-15 300 AAC BLACKOUT 16" Stainless Steel Diamond Fluted Upper Receiver, Left Hand

300 Blackout

AR-15 300 Blackout 16" Stainless Steel Diamond Fluted Upper Assembly – Left Hand / MLOK Rail

The AR-15 300 Blackout 16" Stainless Steel Diamond Fluted Upper Assembly is designed to provide high-performance and versatility for your AR-15 platform, featuring a left-hand side ejecting slick side upper. Whether you're upgrading your AR-15 or building a new one from scratch, this 300 Blackout upper will easily work with your standard .223/5.56 BCG and magazines—no need for special bolts or magazines.

This upper features a 16" 416 stainless steel HBAR barrel with diamond fluting, ensuring enhanced heat dissipation and a reduction in weight without sacrificing strength. The barrel is button rifled with a 1:8 RH twist and a 5/8-24 thread, topped off with a stainless steel X-Treme muzzle brake.

The A3 flat top receiver is constructed from 7075-T6 aluminum and coated with a black hardcoat anodized finish to military specifications. It comes equipped with a forward assist and dust cover for enhanced reliability.

For added customization, the upper includes a 12" free-floating slim MLOK rail, allowing you to mount your favorite accessories securely.

Perfect for left-handed shooters with the left-hand side ejecting configuration, this upper assembly combines performance, durability, and convenience.

Key Features:

• Left-Hand Ejecting: Designed for left-handed shooters, the slick side upper receiver provides a smooth and reliable ejection system.

• Barrel: 16" 416 stainless steel barrel, diamond fluted for reduced weight and better heat dissipation, chambered in 300 Blackout with 1:8 RH twist for optimal projectile stabilization.

• Muzzle Device: Includes a stainless steel X-Treme muzzle brake and crush washer to reduce recoil and muzzle rise.

• Receiver: A3 flat top upper receiver, made from 7075-T6 aluminum, hardcoat anodized to military specs, with forward assist and dust cover installed.

• Gas System: Features a .750 low-profile gas block, made from aircraft-grade aluminum, with a carbine-length gas system for smooth cycling.

• Handguard: 12" mid-length free-floating slim MLOK rail, black anodized, made from durable aircraft-grade aluminum, ideal for mounting accessories.

• Compatibility: Works with standard .223/5.56 BCGs and magazines, no need for special parts to switch to 300 Blackout.

• Overall Length: 25" | Weight: 4.5 lbs.

Specifications:

• Platform: AR-15

• Caliber: 300 Blackout

• Barrel Length: 16"

• Barrel Material: 416 Stainless Steel, HBAR contour, diamond fluted, nitride-coated

• Barrel Twist: 1:8 RH twist

• Muzzle Thread: 5/8-24

• Muzzle Device: Stainless Steel X-Treme Muzzle Brake

• Gas System: Carbine-length, .750 low-profile gas block

• Handguard: 12" Free-floating slim MLOK rail, black anodized

• Receiver: A3 flat top upper, 7075-T6 aluminum, black hardcoat anodized

• Ejection: Left-hand side ejecting (for left-handed shooters)

• Does Not Include: BCG or Charging Handle (sold separately)

• Weight: 4.5 lbs

• Length: 25 inches