As above, the grips are made of laminated wood.
The type of lamination usually used on smaller items like pistol grips and knife handles are different than the thicker laminates used for rifle stocks.
Very thin sheets of wood are peeled off a birch or beech log like pulling a sheet off a paper towel roll.
The sheets of thin wood are injected with a dye, then the sheets are injected with a polymer resin and bonded together under heat and pressure to form a solid mass.
Usually, this type of laminate uses sheets dyed with two to four different colors so the layers have different colors.
The more the wood is shaped and contoured the more "grain" is exposed.
Since the wood layers are injected with the resin, the wood is water proof, and needs no finish.
All that's needed after shaping is to sand it smooth then polish with polishing equipment to whatever level of gloss you want.
This type of resin-impregnated laminated wood is often known as a micarta and is sold under brand names like Dymondwood, Pakkawood, and others.
The laminate is extremely durable.
