Yankee Hill Machine A3 Upper Receiver – AR-15

Description

The Yankee Hill Machine (YHM) A3 Upper Receiver Assembly is a purpose-built AR-15 upper designed for builders and shooters who want a durable, correctly fitting upper receiver. YHM machines these A3 uppers in-house and forges them from 7075-T6 aluminum to ensure consistent fit and function. The assembly includes a dust cover and forward assist and features M4-style feed ramps for reliable chambering with standard AR components. It accepts standard upper receiver parts and mates with mil-spec lower receivers for broad compatibility across common AR-15 builds.

Key Specifications

• This assembly is the A3 Upper Receiver model.
• Manufacturer is Yankee Hill Machine.
• Designed to fit AR-15 platforms and accepts mil-spec lower receivers.
• Constructed from 7075-T6 aluminum and machined in-house.
• Finish is anodized.
• Includes a dust cover and a forward assist.
• Features M4-style feed ramps and accepts standard upper receiver parts.
• Overall dimensions are 2.90 x 5.20 x 13.25.
• Product type is listed as Upper and is an AR-15 accessory.

The YHM A3 upper receiver provides a solid, workmanlike foundation for AR-15 builds and maintenance upgrades. Its forged construction, anodized finish, and integrated features simplify assembly while offering reliable compatibility with common components — a straightforward choice for builders who prioritize fit, durability, and proven engineering.