Just finished this tonight. Wanted to make one for CQB, as we now have a facility in Melville.
King Arms shorty adapter and Phantom 5C2 flashhider.
Was shooting 400 FPS with a long barrel before the changes, so I might have to tune that down a TEENSY bit for CQB :P
The inner barrel comes to about a cm before the start of the flashhider - about M4 length.
