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Yankee Hill Machine
Overview
The Yankee Hill Machine 9mm Bolt Buffer (YHM-925-A) is designed as a buffer-only assembly that complements Mil-Spec carbine buffer tubes. It provides the necessary weight and dampening to optimize the cycling of a blowback-operated system, making it essential for reliable function in 9mm AR builds. While primarily used in 9mm configurations, this buffer is often found in builds utilizing a carbine gas system and chambered for 5.56 NATO, ensuring compatibility across various applications.
Based on build data
Wmd Guns NiB-X Nickel Boron Buffer Tube
Yankee Hill Machine Co., Inc. Ar-15 Gas Tube Black Carbine
Troy Enhanced Trigger Guard SGUA-AMB-00BT-00
Yankee Hill Machine Co Dust Cover 556 NATO for AR Rifles - YHM-111-556
Yankee Hill Machine Ar-15 Charging Handle
Yankee Hill Machine Co., Inc. Ar-15 10.5" Threaded Fluted Barrel 1-8 Twist
| Product | Category | Times Built Together |
|---|---|---|
| Wmd Guns NiB-X Nickel Boron Buffer Tube | 6 | |
| Yankee Hill Machine Co., Inc. Ar-15 Gas Tube Black Carbine | 6 | |
| Troy Enhanced Trigger Guard SGUA-AMB-00BT-00 | 5 | |
| Yankee Hill Machine Co Dust Cover 556 NATO for AR Rifles - YHM-111-556 | 5 | |
| Yankee Hill Machine Ar-15 Charging Handle | 5 | |
| Yankee Hill Machine Co., Inc. Ar-15 10.5" Threaded Fluted Barrel 1-8 Twist | 5 |
Builds in the community that include the Yankee Hill Machine 9mm Bolt Buffer YHM-925-A
| Build | Parts | Total |
|---|---|---|
 | 27 | $2308.80 |
 | 22 | $1476.56 |
 | 30 | $2966.99 |
 | 26 | $2077.37 |
 | 20 | $825.35 |
2 global ratings
Yankee Hill Machine 9mm bolt buffer works correctly on an AR-9 blowback build. Weight is appropriate for cycling 9mm. Wish they would include a backup detent for the price since these can fly during install. Otherwise function is what you need.
Yankee Hills 9mm bolt buffer is for AR-9 builds running blowback. Inside weights dont rattle. Phosphate finish has slight variation across the body, more matte in some spots than others. Function on a 5 inch 9mm SBR has been reliable for a few hundred rounds.
