I shot hundreds of it back in the '90s before I knew about corrosive. I always clean after each firing session but will take extra measures if I fire corrosive. I've never noticed any corrosion in that carbine, including the gas system, such as it is. Speaking strictly in the technical sense, there is no reason you can't use it with proper cleaning immediately after firing. Corrosive residues have to be flushed out with a water-based cleaner like an emulsion of Ballistol:water. Then you clean/oil as usual, using straight Ballistol.