[Crunchmeister]

Originally Posted by Dao

Thanks Crunch.
And what should be the size of the Tightbore inner barrel for the JG HK416 with the ebaybanned barrel extension installed on it? Something around 363mm?

Any barrel designed o fit a 16" M4 will work. I have a TM M4A1 cabine barrel in mine now and it fits perfectly with the barrel extension.