Cleaning My CZ 70 and noticed this

[NextExit]

I bought this gun (used and as-is) a couple years ago but never fired it because there was no magazine.  Well I finally found one and decided to clean it.  When I took it apart, I noticed there's some scratches (not deep but noticeable) in the slide.  You can see them in this pic (just left of center) and some obvious rubbing.   Neglect?  Normal wear from ejection?  Never had a gun this old so who knows how many rounds were put thru it.  Thinking I should just clean it and try it out...

 

[Jonnin]

Looks like "machining" marks to me.  A lot of guns don't polish the insides of unimportant areas and so it looks just like it did when it came off the cutting machine that made it.   Its harmless, if ugly.    I'd check that shiny streak on the right... that slides across each round and it looks (could be dirt, or whatever) like it has a rough spot.  If so, polish that out. 

 

After shooting, some guns will have that area of the slide rubbing the barrel a bit and youll see the wear marks.  If its rough there, polish it.  The gun will tell you.  As you shoot it, it will knock finish off and burnish the areas that are rubbed every shot.  If you find a burnished area that is rough, cleaning it up will smooth out the operation -- sometimes by a LOT.  Shooting it 1000 times will do it for you eventually but if its new I just go ahead and knock it down myself, esp when I can feel it.

Edited May 8, 2016 by Jonnin

[Garufa]

Normal machining and wear with regards to that shiny streak. Common to all semi-autos. Maybe put a dab of oil or grease on the streak.

Load it up and enjoy. CZ 50's are excellent little pistols.

[NextExit]

Thanks for the info. :up:  Any recommendations on what to use to polish the rough spots?

[Jonnin]

Thanks for the info. :up:  Any recommendations on what to use to polish the rough spots?

 

It really depends on how bad it is.  I use dremel polish, diamond dust, and very fine grit sandpaper for most jobs.  Once in a while its bad enough that I use something rough...  but that should be avoided in general.  You should be able to drag whatever you are using across your skin without being scratched for most jobs...  and avoid power tools for most jobs (tempting but they make things uneven).

[NextExit]

Guess it's not that bad as I ran my finger across it and it's not rough. Just looked that way. I'll clean it and put some rounds thru it. Thanks again for your help.