The Binary Firing System GEN 3 (BFSIII) 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 BFSIII provides greatly reduced split times between rounds allowing for tighter groups. - 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 - FEATURES: - Release round can be canceled by simply moving our Patent Pending 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 AR-S1 trigger comes with the straight flat-faced trigger. - NO SALES TO THE STATES OF NEW YORK DELAWARE and NEW JERSEY