This video compares the FosTech Echo ARII and Echo Sport binary triggers, highlighting their differences in price, selector mechanisms, and installation. The ARII is a full drop-in unit at $479 with a 3-position selector, while the Sport is a more affordable $299 option using a standard safety and a separate paddle for mode selection. Both offer semi-automatic fire on trigger pull and release, with compatibility across various AR-15 platforms and conversions.
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