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FOSTECH Echo AR-II Trigger with Milspec M16 Bolt Carrier Group


The Echo AR-II Trigger is a ground breaking drop in design that is approved by the ATF. Includes a Milspec M16 bolt carrier needed for the Echo AR-II to function.

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 8,820,211 B1)
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

The Mil-Spec M-16 bolt carrier group has a carrier machined from 8620 carbon steel, that is heat treated.  Exterior of carrier is parkerized and interior is chrome-lined.  It has a Mil-Spec gas key that is chrome-lined, heat treated and secured to the carrier with Grade 8 fasteners that are properly staked.  The bolt assembly is machined from Carpenter No. 158® steel, shot-peened, HP (High Pressure), MPI (Magnetic Particle) batch tested to ensure that it is free from internal flaws, and has a tool steel extractor that is machined from bar stock.