Originally Posted by PBRLite
"DannyR I don't think so. While the OD of the barrels are the same, the dimensions of the barrel hood different"
Cannot personally speak for the 29, and 30, but for giggles, know, the 20 fits in the 21 slide. As mentioned, also true here, the barrel hoods are different.
From a, always being safe standpoint, there is a reason there are conversion barrels on the market.
Someone will chime in eventually, stating, it's perfectly safe to do! Again, there is a reason for KKM, and Storm Lake, making a conversion barrel.