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Fostech
Overview
The Fostech Outdoors AR-15 AR II Echo Drop-in Binary Trigger is a binary trigger designed to enhance your shooting experience by allowing the firearm to fire once on pull and again on release. This feature can significantly increase your rate of fire, making it a popular choice for builders looking to create a more dynamic shooting platform. It is commonly found in mid-length gas system builds chambered in 5.56 NATO, where quick follow-up shots are essential.
Based on build data

Magpul AFG-2 Angled Fore Grip - Black

Spike's Tactical 5.56 Nato M16 Cut Lightweight Ar-15 Bolt Carrier Group - Nickel Boron

EOTech XPS2 Holographic Sight, Tan - XPS2-0TAN

Aero Precision Ar-15 Breach Charging Handle Ambidextrous Small Levers

Midwest Industries, Inc. Ar-15 Combat Rifle Folding Sight Set

Strike Industries Cobra Billet Aluminum Trigger Guard - Red
Aggregated and anonymized data showing how builders use this product
| Product | Category | Times Built Together |
|---|---|---|
| Magpul AFG-2 Angled Fore Grip - Black | 4 | |
| Spike's Tactical 5.56 Nato M16 Cut Lightweight Ar-15 Bolt Carrier Group - Nickel Boron | 3 | |
| EOTech XPS2 Holographic Sight, Tan - XPS2-0TAN | 2 | |
| Aero Precision Ar-15 Breach Charging Handle Ambidextrous Small Levers | 2 | |
| Midwest Industries, Inc. Ar-15 Combat Rifle Folding Sight Set | 2 | |
| Strike Industries Cobra Billet Aluminum Trigger Guard - Red | 2 |
| Platform | Percentage |
|---|---|
| AR-15 | 100% |
Builds in the community that include the Fostech Outdoors, Llc. Ar-15 Ar Ii Echo Drop-in Binary Trigger
| Build | Parts | Total |
|---|---|---|
![]() | 9 | $3942.00 |
![]() | 27 | $2049.41 |
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