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Yankee Hill Machine
Overview
The Yankee Hill Machine A3 AR-15 Upper Receiver Assembly is a stripped upper designed for builders looking to create a customized platform. Crafted from 7075-T6 aluminum, this A3 receiver offers a lightweight yet durable structure essential for reliable performance. It is compatible with standard AR-15 components and is commonly used in builds featuring a rifle gas system chambered in 5.56 NATO.
Yankee Hill Machine A3 AR-15 Upper Receiver Assembly was the fourth most added upper receiver on GunPartPicker in August 2026, behind the Geissele Automatics AR-15 16 Super Duty Stripped Upper Receiver Ddc, with about 3% of all upper receivers added to builds. That's its 3rd straight month at #4. Builds with this upper receiver are split between 5.56 NATO (57%) and .223 Wylde (18%), split between carbine-length (39%) and rifle-length (27%) gas systems, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today 4 of the 5 retailers we track have it in stock. Prices barely moved in August 2026, holding around $124.34, so there haven't been real sales lately. Buying today, the lowest price is $121.75 at BattleHawk Armory, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
We ranked every upper receiver by how often it shows up in real builds on GunPartPicker.
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Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Yankee Hill Machine A3 Ar-15 Upper Receiver Assembly
| Build | Parts | Total |
|---|---|---|
 | 7 | $1065.85 |
 | 13 | $1178.19 |
 | 14 | $2081.62 |
 | 15 | $1214.43 |
 | 14 | $941.13 |
 | 5 | $161.50 |
 | 17 | $1456.64 |
 | 9 | $1376.26 |
 | 5 | $562.86 |
 | 9 | $1144.11 |
 | 18 | $1616.94 |
 | 27 | $2560.13 |
2 global ratings
Top reviews
YHM A3 stripped upper for a retro build. takedown pin slipped through with thumb pressure on a YHM lower. machining inside the raceway is smooth, no burrs. drop in install was about a minute
anodizing matches the rest of my build perfectly. zero play on the takedown pins
