Fostech ECHO Binary trigger review and practical uses.

A look at the new ECHO from Fostech Outdoors with Series 1 and 2 Hexmags.

The ECHO allows your selector to have a third positions and fire in the "ECHO" mode-
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.

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