An anvil assembly for a fiber roving chopper comprises an annular roller and an annular anvil wheel. The annular roller comprises an inner diameter surface with a plurality of dovetails, and an outer diameter surface comprising a deformable material. The annular anvil wheel comprises an inner diameter surface forming a central bore for mounting the anvil assembly in the fiber roving chopper, and an outer diameter surface extending between a first end and a second end and having a plurality of dovetail slots that receive the plurality of dovetails.