I know that this has been discussed before, but I haven't really found definitive info so......at the risk of being repetative.....
I have a 20inch upper that I would like to cut down to 16inches (or there abouts....) I'd kinda like to take my rifle and make it a dissy.....
What problems am I likely to expect????
I wanted to do this very thing. After talking with ADCO I decided it would be more economical just to buy a new barrel. Of course this then developed into another rifle.
If you have it done correctly it should work just fine.
I am sure Mongo will be here shortly to let you know exactly how to do it.