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Fostech Echo Sport AR-15 Binary Trigger Color: Black, Gun Model: AR-15, Gun Type: Rifle, 27% Off, Blazin' Deal w/ Free S&H

Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
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Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
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Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
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Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
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Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
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Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
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Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
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Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
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Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
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Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
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Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
Fostech Echo Sport AR-15 Binary Trigger, Black, 4140
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Fostech Echo Sport AR-15 Binary Trigger, Black, 4140

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Questions & Answers
Will this work in an extar ep9???? Or would u recommend the Franklin binary trigger? Expert Answer

We cannot recommend any of the binary triggers systems for the Extar EP9. Both units use an AR bolt carrier and Franklin specifically states no polymer lowers for their trigger. My best recommendation would be to contact Extar directly to verify whether they recommend any of the binary triggers because compatibility information for anything that is not a standard AR lower receiver is lacking.

by Armando R., Gear Expert, March 18, 2020
See 4 More Answers
Will this fit a Bushmaster AR-15? Expert Answer

Yes it should work.

by Ethan C., Gear Expert, November 15, 2020
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
buy more ammo by Davis, Verified Owner, December 6, 2022
First, the description didn't mention and I missed it but you have to have the correct bolt carrier group. The "full auto" ones. Without that it will not operate. So plan for that if need be. Other than poor but manageable installation instructio...
Read More...
1/2 found this helpful
Helpful Positive Review
It works without any issues! by Luis Hinojosa, Verified Owner, December 5, 2024
The insulation took about 3 hours to do, because the YouTube videos from the manufacturer are horrible and did not do a good job actually instructing or explaining how to do the installation. Desert roads entertainment, Militia state armory, and Davi...
Read More...
1/1 found this helpful
Helpful Positive Review
fostech echo sport trigger by Beto, Verified Owner, August 16, 2025
If you ready to have fun and spend money on ammo I definitely recommend this trigger!
1/1 found this helpful
Helpful Positive Review
Fostech EchoSport Binary Trigger by Strato, Verified Owner, January 4, 2025
I purchased 2 Fostech EchoSport binary triggers. I looked at the video but it was dark so I looked at the instructions, which I thought was hard to follow. I made a mistake and the whole thing fell apart. Luckily, there weren't that many parts and I ...
Read More...
1/1 found this helpful
Helpful Positive Review
fostech trigger by JC, July 21, 2020
Get ready to spend a lot on ammo becsuse its that fun!!!!! Judt put it on fostech and let it rip you can mow some stuff down!!! Aint nobody gonna block your car or try yo break into your house after you fire of a few rounds with that beast!!!!
36/49 found this helpful
Helpful Positive Review
Fostech echo sport by Biff, March 11, 2023
Works just as you hope. Have already used for several hundred rounds. Once figured out with correct buffer, works like a dream and puts down a mag in seconds. Highly recommend to friends looking at this trigger as an option.
4/6 found this helpful
Read All 77 Reviews

We've got an AWESOME deal for you!

See more Blazin' Deal items
Blazin' Deal
Prices have been cut drastically on this product as part of a special offer. These prices are so low that there's no double-dipping with coupons or any additional discounts, but you'll still get the best deal out there. This offer won't last long, so don't miss out!
Color:
Black
Gun Model:
AR-15
Condition:
New

Code: 3FS-BIN-EAR222-4140

MPN: 4140

UPC: 639266300502

Blazin' Deal
List: $289.99Save 28%
$208.99

Product Info for Fostech Echo Sport AR-15 Binary Trigger

Economical and designed to drop-in and go, the Fostech Echo Sport Trigger is the only upgrade your firearm needs. These Binary Rifle Triggers from the innovators at Fostech feature a safe mode built in that prevents your rifle from firing unexpectedly. With a semi-automatic mode, the Fostech AR-15 Trigger only fires when you pull the trigger. Expertly designed, the Fostech Drop-In Rifle Trigger runs smoothly on your favorite AR platform.image

Specifications for Fostech Echo Sport AR-15 Binary Trigger:

Manufacturer: Fostech
Color: Black
Gun Model: AR-15
Gun Type: Rifle
Condition: New

Features of Fostech Echo Sport AR-15 Binary Trigger:

The Echo Trigger allows the shooter to select from 3 different settings:

  • Safe Mode: Firearm will not fire.
  • Semi-Automatic Mode: Firearm fires when trigger is pulled.
  • Echo Mode: Firearm fires when trigger is pulled and also when trigger is released.

The Echo Sport trigger does not come with a bolt carrier. You will need a full auto bolt carrier in your firearm for the Echo Sport to function.

Package Contents:

  • Fostech Echo Sport AR-15 Binary Trigger

What firearm models does the manufacturer say Fostech Echo Sport AR-15 Binary Trigger is compatible with?

The manufacturer says that Fostech Echo Sport AR-15 Binary Trigger is compatible with AR-15

Fostech Echo Sport AR-15 Binary Trigger Orderable Models

List of Orderable Models

  • Fostech Echo Sport AR-15 Binary Trigger, Black, 4140 , MPN: 4140 , UPC: 639266300502 , Code: 3FS-BIN-EAR222-4140

Fostech Echo Sport AR-15 Binary Trigger Unavailable & Discontinued Models

List of Unorderable Models

  • USED, Fostech Echo Sport AR-15 Binary Trigger, Black, 4140 , MPN: 4140-EDEMO , Code: 3FS-BIN-EAR222-4140-EDEMO-DF-B
  • DEMO, Fostech Echo Sport AR-15 Trigger, Black, 4140 , MPN: 4140-DEMO , Code: 3FS-BIN-EAR222-4140-DEMO
  • USED, Fostech Echo Sport AR-15 Binary Trigger, Black, 4140 , MPN: 4140-EDEMO , Code: 3FS-BIN-EAR222-4140-EDEMO-RE-B
  • USED Fostech Echo Sport AR-15 Binary Trigger, Black, 4140, EDEMO24, Used, Condition Fair , MPN: 4140-EDEMO24 , Code: 3FS-BIN-EAR222-4140-EDEMO24
  • USED, Fostech Echo Sport AR-15 Binary Trigger, Black, 4140 , MPN: 4140-EDEMO , Code: 3FS-BIN-EAR222-4140-EDEMO-DF-F
  • USED Fostech Echo Sport AR-15 Trigger, Black, 4140, EDEMO22, Used, Condition Fair, Condition Fair, Used , MPN: 4140-EDEMO22 , Code: 3FS-BIN-EAR222-4140-EDEMO-US-D
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Last updated 2026-08-05 UTC.