Purchased a nice used 669 9mm in stainless the other day. The slide is stainless and the frame is alloy. Have a few questions. Anyone know the date of manufacture on a TAF 4*** serial number? I would assume they are also lead safe? I ordered a 30 round mag that fits the 6900 series and is supposed to fit the 669. Anyone know anything along this line? Also, anyone else have one? Like it ?