I just wanted to throw out my experience w/ square butte in case anyone here is looking to deal with him. I posted about trading out sights on a m53 and square butte PM'ed me about purchasing the old sights. A price was set and addy's exchanged. square butte sent payment promptly and notified me when his package from me arrived and was very courteous and kept in touch, everything I admire in a STRAIGHT SHOOTER!