FN America

FN America Front Sight Base

Fn America Front Sight Base - Gas Block for AR-15 - view 1

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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Build history on GunPartPicker

Builders have been adding the FN America Front Sight Base to their builds on GunPartPicker since February 2026. All time, it ranks #110 of the 196 gas blocks builders have added.

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Frequently Built With

The part most often added in each category by the builds that include this one

Bravo Company M16 Bolt Carrier Group Black

Bravo Company M16 Bolt Carrier Group Black

Bolt Carrier Group$199in 33% of them
Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4

Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4

Upper Receiver$129 · out of stockin 33% of them
Yankee Hill Machine Co. AR-15 Gas Tube Black Rifle

Yankee Hill Machine Co. AR-15 Gas Tube Black Rifle

Gas Tube$20in 22% of them
Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers

Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers

Charging Handle$69 · out of stockin 22% of them
FAXON Firearms 16" Gov't/socom 5.56 NATO Mid-Length 4150 QPQ

FAXON Firearms 16" Gov't/socom 5.56 NATO Mid-Length 4150 QPQ

Barrel$152in 11% of them
Yankee Hill Machine Complete AR-15 Lower Receiver - M4 Stock

Yankee Hill Machine Complete AR-15 Lower Receiver - M4 Stock

Lower Receiverin 11% of them

Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Platform

94%
AR-1594%
AR-104.7%
AR-91.3%

Caliber

65.9%
5.56 NATO65.9%
.223 Wylde16%
300 Blackout8.8%
.308 Win3.2%
6mm ARC1.6%
Other4.5%

Gas System

45.5%
Mid-Length45.5%
Carbine28.4%
Rifle13.2%
Pistol11.8%
Intermediate0.6%
Other0.5%

Builds Featuring This Part

See all 8 →

Builds in the community that include the Fn America Front Sight Base

BuildPartsTotal
Carbine 16" build
Carbine 16"		17$1287.42
first 5.56 build build
first 5.56 build		20$2074.89
My multi build build
My multi build		13$1658.63
16.5" yankee hill machine recce build
16.5" yankee hill machine recce		24$3990.44
14.7" SBR build
14.7" SBR		23$2367.87
griffin armament 20" build build
griffin armament 20" build		11$1608.94
new 5.56 build build
new 5.56 build		21$1654.40
16" build build
16" build		19$1082.44

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