Yeah if we are talking about the MLOK aluminum handguard, I too have noticed it is front heavy on this model. I barely shoot mine anymore...the disassembly for cleaning is annoying since it requires tools (allan key, etc.) and my allen bolts have already started to strip due to Ruger suggesting 60 inch pounds for tightening. Plus that shock buffer and clip was always annoying - the mcarbo upgrade is a must in this regard.
I put a vertical foregrip on it and I still find it heavy. I recently bought a Magpul AFG and may try that, but I think that aluminum handguard is poorly designed weight wise - not distributed evenly weight wise with the rest of the gun. Those who don't have the aluminum handguard don't understand that there is a huge difference between the regular Ruger PC version and the aluminum mlok handguard version.