The stock recoil bolts are usually staked in place, removing them will destroy the threads,
unless you have a new set, you should not remove them.
You can remove them by center punching the flat side (opposite the bolt handle) and then drilling thru the head with a bit just slightly bigger than the bolt shank. When the head is free, you can drive the body out from left to right. New cross bolts are readily available.
If you don't have a spanner wrench, you can make yourself such a tool, just get a cheap screwdriver that you can live without and take your dremmel with a cut-off wheel and nibble out a notch in the middle. (this post is an redo/expansion of a previous post on this topic by others...)