The flat top M4 Mil-Spec upper receiver are forged CNC Machined from 7075-T6 Aluminum, the hardest and most durable material of any upper! To ensure even more strength they are hard coat anodized.
The Spiral Fluted 20” .223/5.56 Wylde barrel is the perfect marriage of design and precision! The Wylde phosphate barrel fires 5.56 or .223 ammo in less than 1” groupings at 100 yards! This heavy barrel is made from the highest quality 4150 Chrome Moly Steel for accuracy and durability! This barrel comes with a 1:8 twist rate, rifle gas system and head spaced twice from the US manufacturer.
This incredible rail has 200% increase in keymods, so your attachment position options are endless! This rail was designed for shooters that want BUIS at 45 degree angle with no additional costs for attachments.The rail is a 15” CBC Keymod rail made from Airplane Aluminum and then hard coat anodized to improve the strength!
We assemble there uppers exclusively with Veterans of our Armed Services! These military men have an eye for detail, they scope port holes, torque to military specs & quality check each upper.The end result, the highest quality upper assemblies for the money.
Product Details: AR-15 Upper Assembly – 20″ / .223 | 5.56 / 1:8 / Spiral Flute / 15″ CBC Arms Gen 2 Keymod AR-15 Handguard / Rail
➲ Upper Receiver
The foundation of all good AR's is built upon a dependable upper receiver. CBC upper receivers offer best-in-class quality while providing you years of dependable service. Boasting a MIL-SPEC type III hard coat anodized finish and machined from 7075-T6 forged aluminum, this M4 flat-top receiver delivers a lifetime of superior function. You want your AR built upon a solid platform - this receiver gives you the confidence that your AR-15 will function when it counts most.
➲ Rifle Length Gas Tube
An essential component to your AR15 is the gas tube, which keeps your build up and running. This gas tube is constructed from corrosion resistant stainless steel ensuring a lifetime of service.
➲ .750 Low Profile Gas Block
The gas block is a critical link in the chain that is too often overlooked. This component ensures that your AR runs reliably. Made from high-quality steel with a smooth nitride finish, this gas block is efficiently designed to stay put with the percussion of gunfire. With its low profile this gas block allows it to fit under the most ergonomically designed handguards and rails on the market.
➲ Keymod Handguard
Your AR-15 handguard has huge implications in terms of how much you enjoy your shooting experience. Our seven sided Keymod handguard is built to handle the hardest use and abuse of tactical and competitive shooting while offering more versatility than other handguards. It features a full-length picatinny top rail that sits flush with M4 flat top receivers allowing you to have more space for optics and back up iron sights. Due to the “7 sided design”, this rail has more than 200% more attachable surface area of a standard keymod rail. This AR-15 handguard is machined from 6061 aluminum, has a hard coat anodized black finish.
The barrel is one of the few components that directly affect the accuracy and weight of your build. This barrel utilizes the popular and versatile .223 Wylde chamber, which allows for the safe usage of 5.56 NATO ammunition and enhance reliability. It is corrosion resistant resulting in extended barrel life and has a phosphate finish. This is the perfect barrel for an AR build, keeping length and weight to an absolute minimum while still offering a significant ballistic advantage.
➲ A2 Flash Hider
The muzzle device is designed to perform a specific task, like suppress flash intensity or reduce felt recoil. This A2 Flash Hider is machined from quality steel and finished with an exceptionally corrosion resistant salt bath nitride for a lifetime of service. It provides effective flash suppression that preserves the shooter\\\\\\\\\\\\\\\'s night vision by disrupting the muzzle flash when firing in low lighting conditions. While its closed bottom with top and side ports offers reduced dust signature when shooting from the prone position while additionally acting as a compensator.
CBC provides a wide selections of AR-15 upper assemblies in a variety of styles and lengths - all partial AR-15 uppers are assembled with everything less the charging handle and bolt carrier group. Our partial upper assemblies offer quality and performance that will satisfy the most demanding shooter. Better yet, all CBC AR-15 uppers are custom built-to-order enabling us to provide you with the best prices you will find anywhere. The quality of our AR-15 uppers are backed by our Lifetime Warranty - if any CBC upper assembly becomes defective, we will repair or replace it at no charge. Get your AR-15 upper assembly at CBC today and save with free shipping!