The Binary Firing System (BFS) is a 3-position trigger. In position 3 it fires one round on pull and one round on release, making this trigger ideal for both tactical and competition use. The BFS provides greatly reduced split times between rounds, allowing for tighter groups. The Binary AR-Elite trigger comes with premium features which includes interchangeable trigger bows. You may now choose whether you want a curved trigger or a straight flat-faced trigger! Trigger Operation: Position 1 Safe Will not fire Position 2 Semi Fires 1 round per pull Position 3 Binary Fires 1 round on pull and 1 round on release Specifications for Franklin Armory BFS Binary AR-Elite 3 Position Trigger: Manufacturer: Franklin Armory Color: Black Trigger Shape: Curved, Straight Trigger Pull Weight: 4 lb Gun Model: AR-15 Gun Type: Rifle Features of Franklin Armory BFS Binary AR-Elite 3 Position Trigger Release round can be canceled by simply moving our Patented selector out of Binary mode while holding the trigger back Easy to install Smooth trigger pull: 4.5 lbs, +/- 0.5 lbs Positive reset on release phase Enhanced buffer springs for optimal flexibility Works in most AR platforms and calibers including 5.56 NATO, 308 Win, 300 BLK, 9mm, Rimfire, etc.... Compatible with most Bolt Carrier Groups (BCG) Great for competition shooters, tactical shooters, and recreational enthusiasts The Binary AR-ELITE comes with interchangeable curved and straight flat-faced trigger bows Package Contents: Franklin Armory BFS Binary AR-Elite 3 Position Trigger Iincludes both curved and straight trigger bows