I already asked on arf but figure might as well ask here too...

I'm working on a retro inspired build. It won't be accurate to any specific rifle. 16.5" rifle gassed, 3 prong FH, A1 handguard (sadly A2 FSB), slickside upper with A1 carry handle, NDS601 slabside lower.

I'd love a 607 stock, and plan on modifying an airsoft one to fit. Has anyone here done that? For now I think I'll be running an RRA Entry, but I'd like to have some adjustment. I don't have $500 to drop on the stock, hence DIY.