http://www.amazon.com/TACTICAL-EXCLUSIVE-Degree-Transition-Backup/dp/B009EVIXLY/ref=sr_1_1?s=sporting-goods&ie=UTF8&qid=1424313903&sr=1-1
I just mounted these, so I haven't had a chance to abuse them. They feel pretty solid and for 20 bucks it seems like a good deal for metal sights.