BKF AR15 11.5″ 5.56 Patrol Series Complete Quad Rail Upper Receiver

Description

New in 2026 is our Patrol Series featuring the all new BKF Free Float Quad Rail. Making this the perfect tool for patrol duty use. This product is 100% Made in the USA! Our gas tubes, gas blocks and even roll pins are all proudly manufactured in the US. All Complete uppers are headspaced prior to shipping and test fired.

Includes:

• BKF AR15 Assembled Upper Receiver w/ T-Marks
• BKF AR15 11.5″ 5.56 M4 Profile Carine Length 4150 CMV 1/7 Twist Chrome Lined Phosphate Barrel (Pin & Weld Available Separately)
• BKF Carine Length Gas Tube
• BKF A2 Flash Hider
• BKF 9.5″ Free Float Quad Rail
• Product comes assembled
• No BCG or Charging Handle

Standard Upper Features:

• M4 Feedramps
• .250 takedown pin holes
• Laser engraved T-marks
• Upper is Assembled

Our 5.56 chambered 11.5 inch M4 Carbine Length Barrel is machined from CrMoV steel with a chrome lined bore and chamber with a manganese phosphate finish and phosphate coated M4 feed ramp extension.

Additional Info

B. Kings Firearms barrels are manufactured by a Top Tier Barrel Manufacturer to our specifications. B. Kings Firearms barrels are made for combat and heavy duty use. We rate all of our Pinned Gas Block models for full auto use. We guarantee 1 MOA or better on all BKF barrels when used with match grade ammunition.

All NFA/ATF Rules Apply
You may use this barrel with a lower receiver that is a Registered SBR, Machine Gun, or Pistol. Possession of this barrel along with a Non-NFA lower receiver is Prohibited, except when permanently attaching a muzzle device extending the length to 16 inches. B. Kings Firearms barrels are manufactured by a Top Tier Barrel Manufacturer to our specifications. B. Kings Firearms barrels are made for combat and heavy duty use. We rate all of our Pinned Gas Block models for full auto use. We guarantee 1 MOA or better on all BKF barrels when used with match grade ammunition.

PRODUCT SKU: BKF-CUR-11.5CLP-556-FF-9.5-QUAD-A2FH