Light, fast, and hyper-accurate for 5.56 and .223.
This stainless .223 Wylde build kit sports a hyper-accurate barrel forged from 416R Crucible, a by-design alloy made specifically for accurizing barrels as much as possible. Paired with a Wylde chamber, this AR kit will land 5.56 NATO and .223 Remington loads from 55-grain up to those special heavy match loadswith MOA groupings at 100 yards and beyond.
What’s Included
This kit is not a firearm. It includes a prebuilt upper assembly, bolt carrier group, lower parts kit, and buffer assembly with buttstock. It does not include the component to make a firearm: A stripped lower receiver. Pair this rifle kit with an AR-15 80% lower receiver and AR-15 jig to fabricate a receiver, sold separately.
New builder? This guide explains 80 percent lowers.
AR-15 Rifle Upper Assembly Specs
Barreled uppers are assembled in-house before shipment.
Barrel
- Chamber: .223 Wylde
- Contour: M4/Government
- Length: 16”
- Twist Rate: 1:8
- Gas System: Carbine
- Gas Port: 0.750”
- Gas Hole Dia.: 0.070”
- Muzzle Threads: 1/2x28
- Feed Ramps: M4
- Material: 416R Crucible Stainless
- Finish: Stainless
- Process: Button Rifled
- Lining: Stainless
- Extension: M4
- Muzzle: A2 “Birdcage” Flash Hider
Handguard
- Attachment System: 13.5" M-Lok
- Finish: Type III Hardcoat Anodized (Mil-Spec)
- Top Rail: M1913 Picatinny
- Material: Billet 6061-T6 Aluminum
- Attachment: Barrel Nut
Stripped Upper Receiver
- Profile: M4 Flattop
- Material: Forged 7075-T6 Aluminum
- Finish: Type III Hardcoat Anodized (Mil-Spec)
Bolt Carrier Group
- Profile: M16/Full-Auto
- Steel: Carpenter No. 158 (Mil-Spec)
- Exterior: Black Nitride
- Interior: Chrome-Lined
- Gas Key: Staked, Chrome-lined
- Charging Handle: Included
Lower Receiver Parts
- Buffer System: Mil-spec, Carbine
- Buttstock: Mil-spec, M4-type
- Parts Kit: Mil-spec, single-stage
Lower receiver sold separately
No FFL or serialization is required to fabricate a receiver under federal law. However, state laws vary. Some states require serialization or have banned 80% lowers and gun-making kits. We encourage each and every builder to perform their own research about the state and federal laws that apply to them.
WARNING: Handling firearms parts and accessories can expose you to lead and other petroleum products known to the State of California to cause cancer and reproductive harm. For more information go to: www.P65Warnings.ca.gov
Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or "assault weapons" (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily.
AR-15lowerreceivers.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.
