Just wanted to get an answer in here for you, sorry it's late. I have a CW40, and I shoot the heck out of it. Several thousand rounds thru it thus far, and no deformation of the plastic where the guide rod sits. Likely need a new recoil spring before long, but it just hasn't malfunctioned once I got thru the break in period and I profiled the extractor so that Fiocchi ammo will feed reliably.