I have also seen good CETMEs and bad Century builds. G3 ,mags are plentiful, cheap and reliable.(I never needed to tune any) The CETME mags work well too but are more costly. You need to be aware that CETME recoil seem higher than it should be and accuracy is that of a battle rifle...not target/sniper rifle. (2-3MOA is good) To me that is a deal killer and have sold all the CETMEs I have owned due to poor accuracy issues.... poor in my judgement... but standard in a battle rifle.