Q&A for Fostech Echo AR-II Drop-In Binary AR-15 Trigger

Fostech Echo AR-II Drop-In Binary AR-15 Trigger

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Joe, member, from IN, United States, asked on February 22, 2021

During binary fire, can you put it back on safe after the first shot so the second does not fire?

Expert Answer

Answered by Ben, Gear Expert, from UT, United States, on April 19, 2021

That is a good question, most likely not as the hammer would be in the fired position and could not be reset by the standard cycling unless you manually reset it.

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big al, member, from CO, United States, asked on February 05, 2018

dose this come with a bolt carrier do i need a special bolt carrier

Expert Answer

Answered by Ethan C., Gear Expert, from IL, United States, on March 21, 2018

This does not come with a bolt carrier group but it does not require a special one, it will work with most standard bolt carriers.

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Nunya, guest, from NV, United States, asked on June 10, 2021

Will this work with an 80% aluminum lower that was milled?

Expert Answer

Answered by Patrick, Gear Expert, from IL, United States, on August 27, 2021

This trigger is made to drop into any Mil-Spec Ar-15 lower receiver.

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MrDoverfield, member, from CA, United States, asked on March 21, 2018

Will it work in a DPMS 308 rifle?

Expert Answer

Answered by Ethan C., Gear Expert, from IL, United States, on May 23, 2018

The Fostech Echo AR-II will not be compatible with DPMS or AR-10 style .308 platforms. It is intended to be used in the AR-15 platform only.

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Rob, member, from WV, United States, asked on January 17, 2023

Will this work in a cmmg banshee 9mm pistol

Expert Answer

Answered by Hunter, Gear Expert, from OH, United States, on June 08, 2023

Fostech does not state if the Fostech Echo AR-II Drop-In Binary AR-15 Trigger is compatible with Pistol Caliber ARs. I recommend contacting Fostech to confirm compatibility.

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Jason, member, from WI, United States, asked on October 05, 2020

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

Expert Answer

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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Michael, guest, from SC, United States, asked on August 07, 2020

Will this fit a PAP 92 pistol 7.62x39.

Expert Answer

Answered by Bethany Kopel, Gear Expert, from UT, United States, on December 08, 2020

No, the Echo AR-II is designed to function in the AR-15 Platform.

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Chalks, member, from FL, United States, asked on February 27, 2020

Doesn't state that you won't ship this to Florida, so would this be able to ship to Florida?

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Answered by Armando R., Gear Expert, from IL, United States, on March 13, 2020

You would need to check your local laws and regulations to verify that it is legal for YOU to own this product wherever you are located.

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Seattle J, guest, from MD, United States, asked on February 26, 2020

I have an LWRC International SMG 45. Can I use this trigger on this weapon platform? Thanks

Expert Answer

Answered by Armando R., Gear Expert, from IL, United States, on March 13, 2020

This is information direct from LWRC regarding binary triggers:

"The SMG will accept most AR-15 triggers. We have not tested them all however and cannot guarantee function"

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Thomas, guest, from OH, United States, asked on October 24, 2017

Confliction information. I would like clarification. Will the Echo 2 operate on a 9mm JP Enterprise AR-9 billet lower. It has the 9mm standard bolt.

Expert Answer

Answered by Carly R., Gear Expert, from IL, United States, on October 27, 2017

Updated Answer: You will need a full auto bolt carrier in your firearm for the Echo AR-II to function. I would highly recommend contacting us at techsales@opticsplanet.com to ask about specific proprietary bolt carrier groups for calibers that don't use a mil-spec full auto bolt carrier group.

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Q&A for Fostech Echo AR-II Drop-In Binary AR-15 Trigger — 175 Questions & 176 Answers