I'm looking for a Hahn drop in from the bottom magwell adapter. It must have a Colt mag bolt hold open device. I have a Colt 9mm complete bolt assembly that I would like to trade. I have gotten a ramped one so I don't need it. Please let me know the condition of what you have. I have pictures of the bolt available upon request. Please check my feedback. The email button is the best way to contact me. Thank you for your time.