CA Compliance:
Shipping to California
- Status: Complete upper with a barrel. Not a serialized firearm, but we ship it to a licensed dealer only.
- Delivery: Ships to WBT in La Mesa or to the California gun store you choose; select your dealer at checkout. Not shipped to home addresses.
- Learn more: Featureless or fixed magazine: which fits your build · FAQ
About this upper
AR Five Seven AR57 ULT Complete Upper -5.7x28 is an upper receiver chambered in 5.7x28 with a 16" barrel. Finish: Black.
Manufacturer details
AR57 Ultra Light Tactical Upper Assembly 5.7x28mm; 16" Barrel - 1:9 Twist Rate - Black Melonite Finish; Forged from 1 7075 T6 Monobloc Aluminum; 8620 Steel Alloy Bolt Carrier Buffer Tube & Flashider - Black Meonite Treatment Finish. Uses PS90 Mags!Specifications
- Caliber: 5.7x28
- Action: Semi-Automatic
- Capacity: 10
- Barrel: 16 in
- Finish / color: Black
- Magazines included: 1
- California compliance: Legal on featureless AR15s
- Manufacturer part #: AR57-ULT16
- UPC: 051497297985
Buying from WBT Guns
- Delivery: Complete uppers ship to a licensed dealer only. Free pickup at our La Mesa store, or select the California gun store you want it sent to at checkout.
- Payment: Pay in full, put 50% down with the balance due in 14 days, or finance with Credova.
- Questions: Call (619) 667-9453 or email sales@wbtguns.com. FAQ
WBT Guns is family-owned in La Mesa, California, and has shipped parts and receivers to California buyers since 2012.
A note on accuracy. We work hard to keep every listing correct, but specifications, images and compliance details come from many sources and can contain errors or change without notice. Images may show a configuration that is not California-legal. If a detail on this page matters to your decision, call us and we will confirm it against the actual firearm before you order. The compliance information here is general in nature and is not legal advice; California and local laws change, and the configuration described is confirmed at the time of sale. All sales are subject to applicable federal, state and local law and to the buyer's eligibility to purchase.
