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
One Horse 300BLK 16'' Socom Pistol Barrel Complete Upper Receiver for AR15 is an upper receiver.
Manufacturer details
Upgrade your rifle with a versatile 16" .300 Blackout complete upper receiver built for reliable performance, modular flexibility, and consistent accuracy. Designed to handle a wide range of shooting applications, this upper performs effectively with both subsonic and supersonic loads.
At the core is a 16" .300 Blackout barrel paired with a pistol-length gas system, delivering reliable cycling—especially when running subsonic ammunition or suppressed setups. This configuration enhances function across various loads while maintaining smooth operation.
The 15" free-float M-LOK handguard improves barrel stability for increased accuracy while offering ample space for mounting lights, grips, and accessories. Its slim, lightweight design ensures excellent handling without sacrificing durability.
A nitride bolt carrier group provides dependable cycling with added corrosion resistance and long service life. Combined with a full-length Picatinny rail, this upper is ready for optics and accessories right out of the box.
Features
- ONE HORSE 300BLK COMPLETE UPPER RECEIVER W/SOCOM PISTOL BBL FOR AR-15
- Fully assembled and compatible with standard mil-spec AR-15 lowers, this upper is designed for quick installation and immediate use.
- FEATURES
- 16" .300 Blackout Barrel – Optimized for both subsonic and supersonic ammunition
Specifications
- Brand: One Horse LLC
- Manufacturer part #: OHCU04
- UPC: 850078799319
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.
