FosTech Echo AR-II Drop In Trigger

Echo AR-II Binary Trigger

The FosTech Echo AR-II is a drop-in binary trigger for AR-15 pattern rifles. A binary trigger fires one round when you pull it and a second when you release it, so you get a faster rate of fire from an ordinary semi-automatic action. It suits shooters who want that pull-and-release function in a self-contained unit that installs without fitting or gunsmithing.

Features

• Binary Firing Mode — The trigger fires once on the pull and once on the release, doubling the shots per trigger cycle.
• Drop-In Housing — The hammer, trigger, springs and sear sit in one enclosed cassette that drops into the lower receiver and is held by the standard pins.
• Three-Position Selector Included — A replacement safety selector sets the rifle to safe, standard semi-auto or binary mode.
• Two Selector Levers — The kit includes a lever for each side of the receiver, so the selector can be worked by either hand.
• Curved Trigger Shoe — The bow-shaped blade follows the shape of the finger, as on a standard AR trigger.
• Exposed Springs And Pins — The open sides of the housing let you see the springs and engagement surfaces at a glance during inspection.
• Bronze-Toned Finish — The housing and trigger shoe carry a matching bronze-colored finish.
• Small Parts Supplied — The selector detent, spring, mounting screw and additional components needed for installation come in the box.

Fit And Installation

The Echo AR-II is built for mil-spec AR-15 lower receivers, meaning lowers made to the standard military dimensions that most aftermarket parts follow. It replaces the factory fire control group and safety selector. Because the unit is preassembled, installation comes down to removing the old parts, seating the housing and fitting the new selector. Binary triggers are restricted in some states and localities, so confirm your local laws before ordering.