I received an Elftmann Tactical drop in 3 Gun trigger for an AR-15 to review and swapped it in my Barnes Precision Machine SBR AR-15, reviewed here. Though there was nothing wrong with the trigger in the SBR, the Elftmann trigger appeared to be very high quality and as a shooter I need all the help I can get.
Instillation was pretty simple taking only a few minutes since this is a preassembled drop in unit. Since the hammer is part of the assembly, the hammer spring does not index on the trigger pins to hold them in place so once you have the trigger set there are two Allen head screws you tighten and that binds the trigger to the pins, holding them fast. Once you get the trigger installed it can be adjusted without removing it.
Out of the box, this trigger broke clean at three pounds, using aerospace grade sealed bearings, with no take up and just enough over travel for follow through and to find the reset. These triggers are guaranteed drop safe and over a few hundred rounds of various ammunition I had zero light strikes from the skeletonized hammer using .043 double wound polished piano wire hammer spring. The trigger is made of wire EDM machined, hardened A2 tool steel and lightweight aircraft-grade aluminum.
This is my first experience with a flat, straight trigger in an AR platform. It felt a bit odd at first but after a few magazines I began to get used to it, and now I am digging this design. If you prefer the curved trigger, it is also available.
After several months of use and several hundred rounds, the trigger has held up well, with the initial adjustments staying true. A good trigger in just behind good technique for accuracy and this is as good of a trigger as I have ever tried. I do believe it will stay in my SBR.