[JDoorn]

Thank you for the advice.
With a little investagatory work, I discovered that there is an Allen/set screw holding the inner barrel in the outer barrel. Loosen the screw, and the inner barrel slides right out... Go figure.
I can see What, on the lower receiver needs to be cut out. I'm assuming the best tool for that would be a dremmel? When this mod is done is there anything at the bottom of What will be the 1 piece hop up to support it? Or is no "lower support" necessary?
Thanks again