FRANKLIN_M4 16" 5.56 NATO W/FSIII 1/30RD BINARY FIRING SYSTEM TRIGGER INSTALLED! BFSIII M4 FEATURES This new for 2020 M4 rifle features American made components and is manufactured to the strict quality control measures Franklin Armory is known for. This M4 starts life as a standard FAI-15 lower receiver, which includes, yes, you guessed it, the BFSIII Binary Trigger System pre-installed and tested from the factory! The upper receiver is constructed of 7075 T-6 aluminum and features a 16" 1:7 twist LTW Contour barrel that is incredibly accurate. A 15" M-LOK FST rail is included as well and is ready to mount any accessories of your choosing. Rifle ships complete with (1) 30rd magazine. BFSIII M4 SPECIFICATIONS Barrel Length + Type: 16" LTW Contour Handguard/Upper: 15" FST Sights: Optic Ready Twist: 1:7" Charging Handle: Standard Bolt Carrier: Salt Bath Nitride Lower: FAI-15 Trigger: BFSIII Gas System: Midlength Gas Block: Low Profile Muzzle Device: A2 Color: Black Stock: M4 Grip: A2 Calibers: 5.56 NATO