Franklin Armory BFSIII AR-S1 Binary Firing System III Trigger – For AR Platforms | Straight Trigger

Overview

The Franklin Armory BFSIII AR-S1 is a 3-position binary trigger designed for most AR platforms and calibers, including 5.56 NATO, .308 Winchester, .300 AAC Blackout, 9mm, and rimfire. Position 1 functions as safe, Position 2 fires one round per pull for standard semi-automatic fire, and Position 3 fires one round on pull and one round on release to provide reduced split times. The straight trigger features a smooth 4.5-pound pull weight (plus or minus 0.5 lbs), a positive reset on the release phase, and an option to cancel the release round by moving the selector out of binary mode while holding the trigger back. The system includes enhanced buffer springs and is compatible with standard bolt carrier groups. It requires a .154-inch trigger pin and is not compatible with 80% lowers, polymer lowers, or carbon lowers.

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