Fostech Echo Trigger AR II 15
About this product
The Fostech Echo Trigger AR II 15 is a high-performance drop-in trigger designed for AR-15 platforms. It offers a unique firing mechanism that combines semi-auto and binary-like functionality, making it a favorite among enthusiasts and competitive shooters. Since fall 2025, this trigger has been a consistent best-seller in our shop, with customers praising its reliability and ease of installation. Our staff confirms it’s a drop-in fit on every frame tested—no fitting required.
Key Features
- Drop-in installation—no gunsmithing needed
- Unique firing mechanism for semi-auto and binary-like modes
- Constructed from durable, precision-machined components
- Compatible with standard AR-15 lower receivers
- Lightweight design at just 4.3 oz
Specifications
| Weight (measured) | 4.3 oz |
| Material | Steel/Alloy |
| Compatibility | AR-15 Platforms |
| Installation | Drop-in |
| Firing Modes | Semi-Auto/Binary-like |
| Finish | Matte Black |
Frequently Asked Questions
Does this trigger require any special tools for installation?
No, the Fostech Echo Trigger AR II 15 is a drop-in unit that requires no special tools or gunsmithing for installation.
Is this trigger legal in all states?
While the Fostech Echo Trigger AR II 15 is legal in most states, we recommend checking your local laws and regulations before purchasing.
Can this trigger be used in any AR-15 lower receiver?
Yes, this trigger is compatible with standard AR-15 lower receivers and has been tested for a drop-in fit on all frames in our shop.
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