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will this work in a mil-spec AR-15 with a cmmg .22LR conversion? — 2 Answers

by Jason, from WI, United States Asked on October 5, 2020

Name Fostech Echo AR-II Drop-In Binary AR-15 Trigger (4.2)
$479.99 $399.99 Save 17%
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Answered by Bethany Kopel, Gear Expert, from UT, United States, on December 08, 2020

Yes, this works with mil-spec AR lowers.

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Answered by NC chicken, member, from NC, United States, on December 20, 2020

It will not allow the plug of the trigger in Single or binary the sear must be depressed and the CMMG conversion BCG is flat and does not touch the sear.

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Last updated 2025-11-12 UTC.