Airsoft replica of the KAC Triple Tap flash hider. 14mm CCW threads. Scale up or down 1% if the threads don't fit quite right,
Update 27 May 19: Added a second model that has the threads offset 7mm up into the flash hider - so the flash hider will seat closer to the M4's bayonet lug. The barrel cutout is bored to 19mm (sized to fit an airsoft Classic Army CQBR). Also has a "3T" marking on it and the height is shortened back to proportional size.