A
Aeroshaft7.69YHM block holds
Reviewed on April 24, 2026Verified with Build
ran this on a 16 mid length under a YHM diamondback handguard. set screws stayed put after 400 rds. phosphate finish is even with no thin spots. solid value
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Yankee Hill Machine Co Suppressor Gas Block, .750 Diameter, Phosphate Finish, Black
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Yankee Hill Machine
Overview
The Yankee Hill Machine Co Suppressor Gas Block is designed for a .750-inch diameter gas system, making it a versatile choice for optimizing gas flow in your AR-15 build. Its black phosphate finish provides a level of protection against wear and corrosion, ensuring durability in various conditions. This gas block is commonly found in mid-length gas system builds chambered in 5.56 NATO, offering improved reliability and performance.
Specifications
MPNYHM9389SS
FinishBlack
Gas Block Diameter.750
Yankee Hill Machine Co Suppressor Gas Block, .750 Diameter, Phosphate Finish, Black
August 2026 on GunPartPicker
Yankee Hill Machine Co Suppressor Gas Block, .750 Diameter, Phosphate Finish, Black ranked #28 of the 75 gas blocks builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #53 of the 173 gas blocks builders have added. Builds with this gas block are mostly chambered in 5.56 NATO (70%, then .223 Wylde 11%), split between mid-length (53%) and carbine-length (28%) gas systems, and mostly AR-15 (92%).
Today the one retailer we track has it in stock. Buying today, the lowest price is $22.99 at Optics Planet.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
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We ranked every gas block by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Gas Block Guide →Check it against the live catalog:
Frequently Built With
The part most often added in each category by the 83 builds that include this one
Battle Arms Development Rack Ambidextrous AR-15 Charging Handle - Mod C
Charging Handle$80in 13 builds
WMD Guns AR-15 Gas Tube Nitromet Mid-Length
Gas Tube$14in 23 builds
Zro Delta AR-15 Fire Control Group Laser Cut Disconnector
Trigger$36 · out of stockin 11 builds
Diamondback Firearms 5.56 AR-15 Bolt Carrier Group - Nitride
Bolt Carrier Groupin 11 builds
Yankee Hill Machine Complete AR-15 Lower Receiver - M4 Stock
Lower Receiverin 14 builds
Zro Delta AR-15 Forged M4 Stripped Upper Receiver
Upper Receiver$720in 15 builds
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
92.1%
AR-1592.1%
AR-106.3%
AR-91.6%
CaliberBased on real build data showing which calibers builders choose alongside this product.
70%
5.56 NATO70%
.223 Wylde11.4%
.308 Win4.3%
.458 SOCOM1.4%
300 Blackout1.4%
Other11.2%
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
52.6%
Mid-Length52.6%
Carbine28.1%
Rifle14%
Pistol5.3%
Builds Featuring This Part
See all 32 →Builds in the community that include the Yankee Hill Machine Co Suppressor Gas Block, .750 Diameter, Phosphate Finish, Black
| Build | Parts | Total |
|---|---|---|
 | 18 | $1475.88 |
 | 11 | $1341.41 |
 | 22 | $1760.23 |
 | 8 | $616.57 |
 | 22 | $1739.78 |
| 28 | $3380.34 |
 | 29 | $3770.22 |
 | 25 | $1234.94 |
 | 14 | $1229.73 |
 | 24 | $1461.71 |
 | 10 | $448.05 |
 | 12 | $1173.35 |
Customer reviews
4.7out of 5
3 global ratings
Top reviews
N
NathanG2021YHM suppressor gas block shade
Reviewed on April 14, 2026Verified with Build
Yankee Hill Machine suppressor gas block in .750 phosphate has a slightly more matte finish than my other phosphate parts when compared in good light. Mechanically perfect, designed for suppressor use. Set screws engage cleanly into a dimpled barrel.
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B
bl4ck0niYHM suppressor block
Reviewed on April 2, 2026Verified with Build
set screw clamp design holds tight on a .750 journal. phosphate finish matches a phosphate FSB area. low profile sits under any handguard. ports are properly drilled for a suppressed gas signature
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