The new FLOW 556K L is a new variant of the popular FLOW 556K with a locking collar. In fact, the L or Lima designation is for Locking Collar, just like the 556 is for the caliber, K is for short or Kurz and FLOW is a Flow-Through design.
Here, you can see it next to a standard 556K Flow which is DMLS printed in 17-4 Stainless. Designed for toxic fume exposure mitigation, it also offers flash reduction, sound reduction, recoil reduction, accuracy, and repeatability by its unique Flow-Through helical coil and core deflector design. It is full-auto rated and compatible on 5.56, 17 HMR, and 5.7 platforms.
The Lima model of this 3D printed suppressor is currently only available through the Mission Team for authorized customers who are looking for the extra confidence of a locking collar.