Tomster, great gun i think you should take look on this:
http://www.troyind.com/shop/index.php?cPath=23
and to the new G&P M4 Troy Style Metal Body ;-)
ok thanks sturgis, i think that your "tool" is gonna have a twin brother in south america .
But i have a last question, the receiver, was it easy to install, good quality, no need to dremell or fill any thing?