Nice thing about HK/CETME is that it is easy to check the "gap" for clearance with feeler gauges and a little understanding of how they lock up. Century used to warranty them if out of spec. Oversize rollers are (at least used to be) available if not too far out of spec. Not defending Century build quality but G3 clones have a history of needing some tweaking (or return for warranty work} to make them 100% reliable. I would definitely confirm sellers position on warranty repair or replacement before purchasing.
Wondering which FCG the C308 is using, looks like a Navy housing but not sure. CETME FCG won't allow the charging handle to be cycled when on safe and that always seemed like it could be an issue.
