Has anybody used the detachable mags for the SKS? Don't want to go into the reasons I want to go with SKS's instead of AKs.Do the mags attach securely, are they reliable? I don't mind the 10 rd fixed mag/ stripper clips system, but Mrs Freefall wants to be able to put out more rounds. (good girl) Any input would be appreciated. Informed input of course will be more appreciated. thanks.