You will hear many thoughts as to what to do but it's yours and your choice.
Pro's - Gives it that battle rifle feel. Easier magazine change - It's what makes you feel good -
Con's - It's an HK and God ain't making anymore for the US civilian market - It's actually more cost effective to have a clone built to your specific's (G3 Norwegian style -Most updated) and then you can hose a way with the sear pack! - G3K Norwegian would be the cat's meow and SBR it since you have sear pack.
It's your H&K but most here will ask that you keep it original.