I'm looking at possibly buying an ISSC MK22 and had read that some of the earlier rifles had some feeding issues. Does anyone know if these problems have persisted or if they are more reliable now? I searched this on INGO but only saw a few articles of people selling them or briefly mentioning them. I already have a H&K MP5 22SD and love it. Just looking to add something else to the collection that I can shoot with my kid. Thanks for your feedback!