Bestparts on GunBroker sells defective parts and does not stand by their products. After trying to fit the op-rod on 3 different rifles, I sent bestparts an email. With no response for a month, I sent another email in which Bestparts finally answered. He started our communications as if he wanted to rectify the issue, but said he had to communicate with his supplier. I emailed him numerous times to get satisfaction, but he stalled repeatedly until the 90 day limit GunBroker expired on the listing. I even suggested that I could send back the part, he keep the money and just send me something of equal value. Nothing! Once GB deleted the auction from view (and rating), Bestparts accused me of fraud (switching parts). I emailed GB’s customer service and got no response from them either. I will not buy from this person ever again.