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. 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
6 reviews for Fostech Echo AR-II Drop-In Binary AR-15 Trigger
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Kumar –
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.
lblt –
Been having a lot of fun with is trigger and it functions great. In an attempt to make a good trigger even better, I bought a 3rd-party upgrade kit from a company that claims their kit is the “only safe kit” out there. Once “upgraded”, I had nothing but trouble. After removing the upgrade parts, the trigger worked flawlessly again. So don’t be tempted with these kits.
MAL-SBU –
Takes a moment to get used to, but once you do it really does assist in dropping controlled pairs quickly.I added some anti walk pins, go ahead and order the 3gun mod spring for it or the 4lb spring, it’s not hard to replace. But it makes this trigger a nice all round piece. Clean semi, and controlled binary.Only tough part is training yourself to recognize the difference on the two functions when you have years of trigger pull beat into you.
P89 –
By far the best upgrade to my AR so far. Absolutely love it!! I have bought 2 so far within a few months. Super easy to operate. Better stock up on ammo tho, your gonna go through it fast (Lol!).
Ryan –
This runs more reliably compared to the other brand (I have both Fostech and BFS) due to the trigger lock/sere that makes sure the bolt is in battery before the trigger can be released. BFS ran smoothly too but you can easily shoot it too fast and release the trigger before the bolt is back in battery.Fostech’s design prevents that from happening, but did encounter an issue. I test fired it with a DD Mk18 10.3 running an OSS flow through suppressor with an H1 buffer and I experienced bolt bounce after mag dumping my first 30 rounds. Every after 4 rounds ended up with a light primer strike on the next 30-round mags i tried to dump, so I did my research and found out that it’s a common occurance for this system, and that an H2 buffer was recommended to mitigate the bolt bounce. I just ordered an H2 buffer and will see if Fostech’s recommendation of heavier buffer will fix the light primer strike issue because of the bolt bounce.
White Molasses lol –
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.