K
kihno.53love it
Reviewed on April 18, 2026
took it out for a torture test and it kept running. impressed
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Fn America Front Sight Base
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FN America
Overview
The FN America Front Sight Base is a clamp-on gas block designed to fit a gas block diameter of .625 inches, making it a reliable choice for builders looking to achieve optimal gas flow in their AR-15 builds. Constructed from stainless steel, this gas block offers durability and resistance to corrosion, ensuring long-lasting performance under various conditions. This component is commonly found in mid-length gas system builds chambered in 5.56 NATO, providing a solid foundation for accurate shooting and reliable cycling.
Specifications
MPN36069
Mounting TypeClamp-On
MaterialStainless Steel
Gas Block Diameter.625
Available Merchants
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Frequently Built With
Based on build data
Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length
Gas Tube
Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod C
Charging Handle
Radian Forward Assist - 7075 Aluminum - Black
Forward Assist
Spikes Tactical Made in USA Ejection Port Door for AR-15 Style Rifle - SED7002
Dust Cover
Aero Precision Stainless Steel Gas Tube - Mid-Length
Gas Tube
Wilson Combat Ar-15 Billet Upper Receiver
Upper ReceiverBuild 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.
87.9%
AR-1587.9%
AR-109.7%
AR-92.3%
CaliberBased on real build data showing which calibers builders choose alongside this product.
66.1%
5.56 NATO66.1%
.223 Wylde16.1%
300 Blackout6.4%
.308 Win3.9%
6mm ARC1.4%
Other6.2%
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
47.3%
Mid-Length47.3%
Carbine27.6%
Rifle15.1%
Pistol9.1%
Intermediate0.4%
Other0.6%
| Product | Category | Times Built Together |
|---|---|---|
| Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length | Gas Tube | 127 |
| Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod C | Charging Handle | 90 |
| Radian Forward Assist - 7075 Aluminum - Black | Forward Assist | 86 |
| Spikes Tactical Made in USA Ejection Port Door for AR-15 Style Rifle - SED7002 | Dust Cover | 82 |
| Aero Precision Stainless Steel Gas Tube - Mid-Length | Gas Tube | 73 |
| Wilson Combat Ar-15 Billet Upper Receiver | Upper Receiver | 72 |
| Platform | Percentage |
|---|---|
| AR-15 | 87.9% |
| AR-10 | 9.7% |
| AR-9 | 2.3% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 66.1% |
| .223 Wylde | 16.1% |
| 300 Blackout | 6.4% |
| .308 Win | 3.9% |
| 6mm ARC | 1.4% |
| .450 Bushmaster | 1.1% |
| 6.5 Grendel | 0.8% |
| .458 SOCOM | 0.8% |
| 7.62x39mm | 0.6% |
| .223 Remington | 0.6% |
| 9mm | 0.5% |
| .350 Legend | 0.3% |
| 7.62x51 NATO | 0.3% |
| .204 Ruger | 0.2% |
| .22 ARC | 0.2% |
| .45 ACP | 0.2% |
| .50 Beowulf | 0.2% |
| 6.5 Creedmoor | 0.2% |
| 6.8 SPC II | 0.2% |
| Gas System | Percentage |
|---|---|
| Mid-Length | 47.3% |
| Carbine | 27.6% |
| Rifle | 15.1% |
| Pistol | 9.1% |
| Intermediate | 0.4% |
| Blowback | 0.4% |
| Proprietary | 0.2% |
Builds Featuring This Part
See all 8 →Builds in the community that include the Fn America Front Sight Base
| Build | Parts | Total |
|---|---|---|
 | 17 | $1229.49 |
 | 20 | $1988.38 |
 | 13 | $1261.49 |
 | 24 | $1944.58 |
 | 23 | $2310.29 |
 | 11 | $1504.05 |
 | 21 | $1681.64 |
 | 19 | $1020.22 |
Customer reviews
5.0out of 5
1 global rating