I haven't heard anything bad about any of the .22 uppers, except for Chiappa.I did not like the m&p 15-22. And it's nice having a familiar trigger in a lower. I will keep doing some digging on prices and quality. Seems most have had luck with a variety of brands. Are there any to just avoid all together? I tend to shoot whatever ammo I can find through my. 22's preferably I would like to find a upper that eats any ammo.