It was custom installed by Rudy @ Bingo Airsoft Works. He is a genius.
More info here: http://www.bingoairsoftworks.com/vfc-hk417-polarstar-fusion-engine-conversion/
Thanks for the compliments. It truly is an amazing gun esp with a P*.
Its VLTOR ACM version. I think I got it from px-airsoft.
It has a new AAC Dark Earth suppressor now with an Orga 500 mm barrel w/ flat hop.
Range is about 320 ft.
Thanks for the comments.
Sent from Hercules