I am new here, as of today. I have an MSAR STG-556 that has never been fired outside of the factory. My intent was to sell it, but I'm having second thoughts, now. I would appreciate some opinions about the gun. I have searched a bit, and it seems people love them or hate them. One thing I would like to know, is the advantages or disadvantages with the 20 inch barrel. Also, since Microtech is no longer in business, is there a chance these guns will hold a decent value for any length of time or is this the time to GB it?