Fostech - Complete LITE Lower Receiver - ECHO ARII Binary Trigger Factory Installed - Tungsten Cerakote - Multi-Caliber - Blem - 6100-TUN-4150

We think that this is one of the finest and most practical items in the firearms industry. By purchasing a Complete Fostech Echo II Lower, you can utilize virtually any AR-15 upper already in your possession and try out the fascinating world of binary trigger shooting in any combo of your choice. The receiver is multi-caliber so as long as the caliber your shooting feeds from standard AR-15 .223 / 5.56 based mags, you should be good to go. The receiver is fully assembled so all you should have to do is drop on a compatible upper and push the pins and you are ready to rock and roll in seconds.

A word about the " Blems" ... Whenever Fostech offers something under a Blem Sku it means that they have found a visible cosmetic imperfection during their inspection process. In all cases, the blemish will be cosmetic in nature only with the mechanics and function of the item still at 100% and all factory warranties will still apply. However, if this concerns you then the ultra-safe thing to do is don't buy it. Our experience has taught us that there are some people that will search over something like this with a magnifying glass until they think they spot the blem, and then it will keep them up at night because... well some folks are just like that. However, the reality is that the folks at Fostech are simply hyper-critical when it comes to their product and they will segregate an item and call even the slighted imperfection, that most companies would release as a first-run item all day long, a blem. In fact, they will sometimes separate out the entire lot over just a few pieces where they have spotted a minor cosmetic imperfection in the bunch. When we are able to discern what they are calling a blemish it is typically a small run in the cerakote due to overspray in a certain area on the receiver, and this area could even be... and in many cases is... an internal surface, where it can't be seen to start with. We have also seen them call perfect finishes "Blems", due to minor color differences between the shade of color that their color chart calls for, and what the end product resulted in. For example a Stealth Black, as opposed to a Midnight Black. Heck, black is black to me and industry standards in regards to shades in color vary wildly so I wouldn't ever consider this alone to be a blem, but hey, Fostech's attention to detail is what makes their products so desirable so if they want to offer Blem pricing on something so close to perfect, then we will be proud to pass it along. 


Note - This product ships with no magazine. This receiver cannot ship to California, the District of Columbia, Iowa, New Jersey, New York, Hawaii, Rhode Island, Flordia, Maryland, Connecticut, Washington, Oregon, Massachusetts.

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

Safe Mode: Firearm will not fire. 
Semi-Automatic Mode: Firearm fires when the trigger is pulled. 
Echo Mode: Firearm fires when the trigger is pulled and also when the 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 8,820,211 B1)   
PATENTED Technology licensed through Franklin Armory inside the Echo AR-II Trigger, including U.S. Pat. Nos. 9,952,012 and 9,952,013
Light, clean, and crisp pull in Semi-Automatic Mode
Trigger Shape - Traditional Curved
Trigger Pull Weight - Range 4.5 - 5 lb
The Echo Trigger is packed full of cutting edge technology