Originally Posted by repo4sale
Can i get a drop in 10mm barrel for my glock21 & just put in a 10mm mag?
Or is it too hot of a load for my glock21???
You will need a KKM conversion barrel, and the 21 is good to go, running 10MM. There are those that feel just taking a 10MM barrel in is fine, but not me. The barrel hood is slightly different dimensions, and although will fit, it's not a proper fit. Yes all that is needed after a conversion barrel is a G20 magazine.