M3 impact owners a favor.

If your worried about the fit of the Impact. Try looking at the Kraford and Lypt butt stock. https://krafordandlypt.com/products/kls-2-pre-order  It will allow you adjust the cast, cant and pull length of your gun. I too prefer a longer gun. I find myself sensitive of the pull length and cant. I fixed my problems with the K&L kls2.

Mont

Thanks. I like those better than the saber tactical. ones i looked at. I would like to add 2" to it. and i think it will fit me good.
 
Thanks. I like those better than the saber tactical. ones i looked at. I would like to add 2" to it. and i think it will fit me good.
If you haven't seen already, there are now more options for the KLS FX platform with the KLS-3.
The KLS-3 now has quick LOP adjustment and 2 pad configurations, the K&L bench or the Magpul PRS pad.