Right, you just unscrew the existing stock and replace it with the new one. The old stock my need some hammer tapping to work it off, but if you can operate a screw driver this stock will work. Its a popular replacememnt stock for those that don't want to do a PG conversion.
Ok, bear in mind that I have almost NO mechanical aptitude, but...
I'm trying to put a gilberts guns ATI skeleton stock on my 21" saiga .308, however, the damn standard sporter synth stock doesn't want to come off. I have removed the two visible screws on the standard stock, one on top and one underneath.