is the problem that the scope seems too close?? or that the actual stock is short??
i cant see any way your noticing 1/4" difference from a gun that feels good and a gun that feels awkward...
personally i like my stocks kinda short...when i shoot an m4 my stock is collapsed and my nose is on the charging handle...
everyone is different...but i think this is more of a scope/mounting issue than it is a stock issue as 1/4" is hardly anything and you like a stock 1/4" different...