About the YHM Forearm Wrench
All-in-one wrench for YHM handguard barrel nuts and jam nuts.
Key Features
- Barrel nut wrench plus jam nut spanner
- All-in-one install tool
- Recommended for MR7/Black Diamond install
- Made in USA
Specifications
| Manufacturer | Yankee Hill Machine Co. (YHM) |
|---|---|
| Part Number | YHM-9621 |
| Type | Wrench |
| Material | 1018 carbon steel |
| Finish | Black oxide |
| Length | 8″ |
| Compatibility | AR-15 |
FAQ
What does it fit?
AR-15 pattern rifles. Confirm specs such as barrel journal diameter, gas system length or receiver fit before ordering.
What’s included?
One Forearm Wrench as shipped by YHM.
Where can I buy it?
Order online from Black Bayou Armory or visit our store in Benton, Louisiana.






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