http://www.airsoftpost.com/product_i...ducts_id=31662
http://www.airsoftpost.com/product_i...ducts_id=29266
I found these but they don't seem that they'd do the job since there are not any threads there...
Also found:
http://www.airsoftpost.com/product_i...ducts_id=28382
But it seems that it needs a stock tube to work...
I want something like the VFC M4ES Baby rear swivel...