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Mfg Item #: FOST4100
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.
The Echo Trigger allows the shooter to select from 3 different settings:
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.