G3 superb , BCM superb , M733 superb , FAL superb , XM177 superb , APFG MCX again superb but people like to harp on about older gen stuff or repeat things like "GBBs don't work in winter" or "TM never have QC" issues . The earlier VFC GBBs for sure had some issues and especially the gen 1 M4 but most others are blown out of proportion . The AEGs on the other hand ..... Bit more of a lottery