Those arent holes in the gun they are white decals to give it that look, if you remove them it has a regular stock underneath
From Winchester:
There’s never been a rifle that looks and performs like a Coyote Outback Stainless. The satin-finished gray laminated stock with extra bipod stud has been extensively lightened with
flow-through cutaways in both the buttstock and fore-end areas, saving more than a pound of weight