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Fostech Echo ARII Drop In Trigger for the AR-15

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MSRP Price: $479.00
Our Price: $475.00
You Save: $4.00 (1 %)
We currently have 1 available.
Manufacturer: Fostech
Manufacturer Part No: 4150

The Echo AR-II Trigger is a ground breaking drop in design that is approved by the ATF. The Echo AR-II trigger does not come with a bolt carrier. You will need a full auto bolt carrier in your firearm for the Echo AR-II to function. If you have any questions in regards to if you have a full auto carrier, please visit

The Echo Trigger allows the shooter to select from 3 different settings

  • Safe Mode: Firearm will not fire.

  • Semi-Automatic Mode: Firearm fires when trigger is pulled.

  • Echo Mode: Firearm fires when trigger is pulled and also when trigger is released.

The Echo Trigger is designed with safety being the utmost priority. When the shooter is in the Echo Mode and depresses the trigger one round is fired, if the target moves, the shooter can move the selector to the safe position and a second round will not fire upon release.

The echo trigger has several distinct features

  • PATENTED Design that gained ATF Approval (Patent # US 8,820,211 B1)

  • PATENTED Technology licensed through Franklin Armory inside the Echo AR-II Trigger, including U.S. Pat. Nos. 9,952,012 and 9,952,013.

  • Technology licensed through HIPERFIRE inside the Echo Trigger

  • Light, clean, and crisp pull in Semi-Automatic Mode

  • The Echo Trigger is packed full of cutting edge technology

  • Reliable function in Echo Mode

These are the restrictions that we know of, there may be more out there. Customers

are responsible for knowing their own local and state laws.

Echo AR II Drop-In Triggers cannot ship to the following states: New Jersey, North Dakota, Connecticut, Oregon, Washington or Florida

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