FosTech Echo ARII vs Echo Sport: What's The Difference?

Published on March 2, 2020
Duration: 17:11

This guide details the installation and operation of FosTech Echo ARII and Echo Sport binary triggers, emphasizing proper safety protocols and firing techniques. It highlights the differences in mode selection between the two models and provides insights into achieving reliable function, particularly when using them with various AR-15 platforms and conversions. The information is presented with a focus on technical accuracy and practical application.

Quick Summary

FosTech Echo triggers, including the ARII ($479) and Sport ($299) models, are legal semi-automatic devices firing one round per trigger pull and release. Key differences include the ARII's 3-position selector versus the Sport's paddle system. Proper cadence is crucial to avoid 'hammer follow' and ensure reliability with various AR-15 conversions.

Chapters

  1. 00:00Introduction to FosTech Echo Triggers
  2. 01:24Echo ARII vs. Echo Sport Differences
  3. 02:38User Experience and Cadence
  4. 04:37Compatibility and Versatility
  5. 07:02FosTech Eagle Rifle Overview
  6. 08:16Legal Definitions and Performance
  7. 09:44Origin Shotgun and Future Products

Frequently Asked Questions

What is the main difference between the FosTech Echo ARII and Echo Sport triggers?

The primary difference lies in their mode selection and price. The Echo ARII features a 3-position selector and its own hammer, retailing for $479. The Echo Sport, priced at $299, uses a standard 2-position safety combined with a separate paddle for switching between semi-automatic and echo modes.

Are FosTech Echo triggers legal?

Yes, FosTech Echo triggers are legal as they are classified as semi-automatic. They fire one round per distinct trigger action (pull or release), which complies with current ATF definitions for semi-automatic firearms.

What is 'hammer follow' and how can it be avoided with Echo triggers?

'Hammer follow' occurs when the hammer doesn't stay cocked and falls prematurely. To avoid this with Echo triggers, especially in 'ECHO' mode, maintain a consistent trigger pull cadence. The principle of 'slower is faster' applies; a steady rhythm prevents malfunctions.

Can FosTech Echo triggers be used with AR-15 caliber conversions?

Yes, both the Echo ARII and Echo Sport triggers are compatible with .22 LR and 9mm AR-15 caliber conversions. They also work with belt-fed uppers like the FightLite, provided an M16-cut bolt carrier group is utilized.

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