Yankee Hill Machine A3 AR-15 Upper Receiver Assembly
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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.
Specifications
Available Merchants(4)
Prices checked
Price Alert
October 2026 so far on GunPartPicker
Yankee Hill Machine A3 AR-15 Upper Receiver Assembly ranks #39 of the 776 upper receivers builders have added on GunPartPicker so far in October 2026, behind the PSA 8.5" Pistol-length 300AAC Blackout Nitride 7" Lightweight M-LOK Upper - No BCG or CH, with about 1 in every 250 upper receivers added to builds. Down from #7 in September. Builds with this upper receiver are split between 5.56 NATO (49%) and .223 Wylde (23%), split between carbine-length (33%) and mid-length (28%) gas systems, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today 2 of the 4 retailers we track have it in stock. Prices barely moved in September 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 September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by hundreds of builds that include this one
Wilson Combat AR-15 Lower Receiver Forged
Breek Arms AR-15 Warhammer MOD2 Ambidextrous Charging Handle Black
Bravo Company M16 Bolt Carrier Group Black
ALG Defense Qms AR-15 Trigger Set
Wilson Combat AR-15 Starburst Gunfighter Pistol Grip Black
Magpul AFG-2 Angled Fore Grip - Black
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all builds →Builds in the community that include the Yankee Hill Machine A3 Ar-15 Upper Receiver Assembly
| Build | Parts | Total |
|---|---|---|
 | 7 | $1124.61 |
 | 13 | $1207.32 |
 | 14 | $2079.56 |
 | 15 | $1168.27 |
 | 14 | $988.64 |
 | 5 | $161.50 |
 | 17 | $1467.51 |
 | 9 | $1072.76 |
 | 5 | $562.86 |
 | 9 | $1221.08 |
 | 18 | $1692.77 |
 | 27 | $2338.41 |
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