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Fostech Echo AR-II Drop-In Binary AR-15 Trigger 4150 Color: Stainless Steel, Finish: Metallic, 17% Off w/ Free Shipping

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Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
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FosTech Outdoors Echo AR-II Drop-In Trigger for AR-15s Feature
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FosTech Outdoors Echo AR II Trigger
Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
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Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
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Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
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Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
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Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
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Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII
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Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII

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

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.

by Ben, Gear Expert, April 19, 2021
See 9 More Answers
dose this come with a bolt carrier do i need a special bolt carrier Expert Answer

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.

by Ethan C., Gear Expert, March 21, 2018
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
happy customer by Steve, Verified Owner, May 10, 2024
I got it fast very well built trigger fair price definitely would recommend to anyone and would recommend optics planet to anyone also
2/2 found this helpful
Helpful Positive Review
Echo sport vs Echo ARll by galaxy991, November 4, 2024
installed this trigger yesturday took about 2 minnets I highly recomend this trigger over the sport in mt oppinion it is much more reliable I tried several times to get the sport to function correctly but could not get it to work correctly in a BFI l...
Read More...
2/4 found this helpful
Helpful Positive Review
My Favorite Trigger by Kumar, Verified Owner, November 2, 2017
I've Only had a few 100 rounds through this trigger, but have not had any issues what so ever. Best upgrade on any AR by far. Easy to use and the install is straight forward and easy. Only down side is the price, but trust me It's worth it.
60/76 found this helpful
Helpful Positive Review
finiky, rough, spongy trigger but so far no issues by Robert Shivers, Verified Owner, May 16, 2025
The price is one big set back. Other than that it’s a lot easier to install than the original sport.it does look A little bit on the hard side. Also idk if I did something wrong during the installation process I followed all the instructions as well ...
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1/1 found this helpful
Helpful Positive Review
Fostech Echo 2 by White Molasses lol, June 9, 2023
Love this trigger. Works as advertised. You DO NOT need a specific Fostech BCG for the Echo 2. Any FULL AUTO BCG works. My only complaint is the safety selector levers are complete garbage and they are proprietary.
3/4 found this helpful
Helpful Positive Review
way better than thr echo sport- by Chris S, August 17, 2024
If you think you’re ready for a binary trigger and you want to attempt controlling rapid fire, go ahead and save an extra hundred dollars for the echo two as it is much easier to install and the trigger pole and reset or a lot more like what you woul...
Read More...
1/1 found this helpful
Read All 153 Reviews
Color: Stainless Steel Trigger Shape: Traditional Curved Trigger Pull Weight: 4.5 - 5 lbGun Model: AR-15 Condition: New

Code: 3FS-BIN-EAR-FT-ECHO-ARII

MPN: 4150

UPC: 639266300021

List: $479.99Save 17%
$399.99

Product Info for Fostech Echo AR-II Drop-In Binary AR-15 Trigger

The Echo AR II Trigger from Fostech is an ATF-approved rifle trigger built specifically for AR 15 platform weapons. These Rifle Triggers feature an innovative drop-in design for easy installation, and deliver crisp, light pulls while in semi-auto mode. Overall, the Fostech Echo Trigger has 3 different modes: safe (firearm will not fire), semi-auto (gun fires when trigger is pulled), and echo (weapon fires when trigger is pulled and released). These drop-in AR 15 triggers require a full-auto bolt carrier to function properly, and bolt carriers are not included with purchase.image

With drop-in installation, cutting-edge technology, and clean trigger pulls, the Echo AR-II Trigger is an excellent addition to your AR platform. Grab one of these AR 15 triggers from Fostech today to improve your shooting technique and deliver top-level performance, shot after shot.

Specifications for Fostech Echo AR-II Drop-In Binary AR-15 Trigger:

Manufacturer: Fostech
Color: Stainless Steel
Finish: Metallic
Fabric/Material: Proprietary Stainless Steel Alloy
Trigger Shape: Traditional Curved
Trigger Pull Weight: 4.5 - 5 lb
Gun Model: AR-15
Gun Type: Rifle
Condition: New
Weight: 4 oz

Features of Fostech Echo AR-II Drop-In Trigger:

  • Patented Design that gained ATF Approval
  • Light, clean, and crisp pull in Semi-Automatic mode
  • Packed full of cutting edge technology that includes HiperFire technology and FosTecH's secondary disconnect
  • Reliable and dependable Function
  • No proprietary carrier group need with The Echo AR II 6
  • Drop in Cassette design

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 Trigger is designed with safety being the utmost priority. When the shooter is in the Echo Mode and depresses the trigger one round is fired if the target moves the shooter can move the selector to the safe position and a second round will not fire upon release..

The Echo Trigger has several distinct features:

  • PATENTED Design that gained ATF Approval (Patent # US 8820211 B1)
  • PATENTED Technology licensed through Franklin Armory inside the Echo AR-II Trigger including U.S. Pat. Nos. 9952012 and 9952013.
  • Technology licensed through HIPERFIRE inside the Echo Trigger.
  • Light clean and crisp pull in Semi-Automatic Mode.
  • The Echo Trigger is packed full of cutting edge technology.
  • Reliable function in Echo Mode.

Package Contents:

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

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

The manufacturer says that Fostech Echo AR-II Drop-In Binary AR-15 Trigger is compatible with AR-15

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

List of Orderable Models

  • Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII , MPN: 4150 , UPC: 639266300021 , Code: 3FS-BIN-EAR-FT-ECHO-ARII

Fostech Echo AR-II Drop-In Binary AR-15 Trigger Unavailable & Discontinued Models

List of Unorderable Models

  • USED Fostech Echo AR-II Drop-In Binary Trigger, Metallic, FT-ECHO-ARII, EDEMO2, Condition Parts Only/Salvage, Defective , MPN: 4150-EDEMO2 , Code: 3FS-BIN-EAR-FT-ECHO-ARII-EDEMO-DF-F
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