I found this body on ASGI'S website . . . . http://www.airsoftgi.com/product_info.php?products_id=6439 Do you think that the forward assist will still activate the spring detentioner? That is one of my favorite features of this gun so I would still like to utilize it. Also are there other metal bodies for the gr16? And random question... If you have a gr16 what have you done to it, what upgrades do you think simply make it awesome?