What Rogerborg said. Anyway KWA don't make a M712 do you mean KWC? also which version as they make NBB and GBB models that are co2 powered. HFC also make a NBB co2 (probably the same gun as KWC) and WE make a green gas GBB that will not be hot. For the KWC you could either widen the nozzle to reduce pressure, reduce the spring on the knocker valve striker to reduce gas volume Or not use co2 at all and get some refillable green gas bulbs.
What Rogerborg said. Anyway KWA don't make a M712 do you mean KWC? also which version as they make NBB and GBB models that are co2 powered. HFC also make a NBB co2 (probably the same gun as KWC) and WE make a green gas GBB that will not be hot. For the KWC you could either widen the nozzle to reduce pressure, reduce the spring on the knocker valve striker to reduce gas volume Or not use co2 at all and get some refillable green gas bulbs.