Yankee Hill Machine complete lower with M4 stock lines up perfectly with my YHM upper. Anodize matches between receivers. Stock locks tight on the included tube. Standard mil-spec dimensions for all the lower parts kit components.

Yankee Hill Machine
Overview
The Yankee Hill Machine Complete Ar-15 Lower Receiver - M4 Stock is a lower receiver. Compare prices from multiple merchants and find the best deal.
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Based on build data

Wilson Combat Ar-15 Billet Upper Receiver
Upper Receiver
Bravo Company Manufacturing Ss410 Mid Length Ar-15 Upper Receiver Group - Mcmr-15 Handguard - 16"
Upper Receiver
Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod C
Charging Handle
Yankee Hill Machine Co., Inc. Ar-15 16.5" Threaded Fluted Barrel 1-8 Twist
Barrel
Geissele Automatics Llc Ar-15 Ssa-E X Lightning Bow Trigger

Zro Delta Ar-15 Forged M4 Stripped Upper Receiver
Aggregated and anonymized data showing how builders use this product
| Product | Category | Times Built Together |
|---|---|---|
| Wilson Combat Ar-15 Billet Upper Receiver | Upper Receiver | 23 |
| Bravo Company Manufacturing Ss410 Mid Length Ar-15 Upper Receiver Group - Mcmr-15 Handguard - 16" | Upper Receiver | 20 |
| Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod C | Charging Handle | 20 |
| Yankee Hill Machine Co., Inc. Ar-15 16.5" Threaded Fluted Barrel 1-8 Twist | Barrel | 18 |
| Geissele Automatics Llc Ar-15 Ssa-E X Lightning Bow Trigger | 18 | |
| Zro Delta Ar-15 Forged M4 Stripped Upper Receiver | 17 |
| Platform | Percentage |
|---|---|
| AR-15 | 100% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 79.9% |
| .223 Wylde | 8.6% |
| .450 Bushmaster | 5.8% |
| 300 Blackout | 2.2% |
| 6mm ARC | 1.4% |
| .308 Win | 1.4% |
| .458 SOCOM | 0.7% |
| Gas System | Percentage |
|---|---|
| Mid-Length | 49.2% |
| Carbine | 25.8% |
| Rifle | 22.7% |
| Pistol | 2.3% |
Builds in the community that include the Yankee Hill Machine Complete Ar-15 Lower Receiver - M4 Stock
| Build | Parts | Total |
|---|---|---|
![]() | 10 | $1249.04 |
![]() | 12 | $1522.38 |
![]() | 29 | $3529.69 |
![]() | 14 | $4786.76 |
![]() | 13 | $603.33 |
![]() | 22 | $1723.66 |
![]() | 24 | $2114.39 |
![]() | 24 | $6565.85 |
![]() | 10 | $2623.83 |
![]() | 9 | $1378.91 |
![]() | 25 | $1252.78 |
![]() | 22 | $2301.96 |
4 global ratings
Yankee Hill Machine complete lower with M4 stock lines up perfectly with my YHM upper. Anodize matches between receivers. Stock locks tight on the included tube. Standard mil-spec dimensions for all the lower parts kit components.
Yankee Hill Machine complete lower with M4 stock arrives ready to mate to an upper. Anodize matches their other parts. Mil spec trigger is functional but replaceable. Stock locks tight on the included tube. Good base for a complete build.
YHM complete lower with M4 stock is mostly ready to mate to an upper. Wish takedown pins were included since I had to source separately. Stock locks tight on the included tube. Mil spec trigger is functional baseline.
Yankee Hill Machine complete lower with M4 stock has tight mate to the upper with no rattle on the takedown pins. Anodize matches between YHM uppers and lowers. Stock locks tight on the included tube. Standard milspec parts kit.