This high quality SIG P320/WCP320 guide rod is precision machined from hardened stainless steel with a bead blasted finish. This rod is profiled to use a full-size 1911 recoil spring so you can easily tune your gun with commonly available springs, to the recoil impulse of your ammunition. Features: Machined from solid stainless steel with a bead blast finish Fits full size 320 models and variants like the WCP320 (Not compatible with X5 models or Carry, Compact or Subcompact models)