I installed the
CGW pro-grade upgrade package last night. It took a while to learn how to detail disassemble and reassemble the P-07 from the referenced “
Installation Tutorial”. The videos are definitely not a detailed ‘how to’ guide nor do they describe the implications of the various parts and sub-kits included in the assembly, or anything about what to polish. I did leverage some other videos that I pulled off of YouTube for the slide and trigger return spring, which fortunately was very similar to my Tanfoglio Stock 2’s.
Trigger Warning: This process requires some knowledge, skills, tools (roll pin and ability to manufacture simple tools like slave pins and a slotted screwdriver), patience and an investment of time on the part of the installer. If this isn’t you, send it to CGW for installation. It will be $ well spent,
Nothing is said about polishing; that will have to be an exercise for another evening as it took me a good 4 hours to do a first time disassembly and reassembly with the CGW parts. Disassembly and reassembly should go considerably easier next time.
I also didn’t have time to replace the sights with the flat black arrears and front fiber optic.
I’ll admit that I don’t know much about CZ’s, but I am pretty familiar with Tanfoglio Stock 2’s, which are cousins to the CZ-75 models, BUT not at all that similar to the CZ Omega trigger system.
I installed the 15 lb golden ‘competition/range’ hammer spring as opposed to the 18 lb defense spring. I’m guessing more weight options are available from Wolff. For my purposes, if the gun will light off all of my reloaded hard CCI primers reliably I have little doubt it will light off federal HST 147 carry ammo.
I did not install any of the heavier springs. I will note this comment on the senior spring package.
The bit about hammer follow got my attention, but I did decide to just leave the OEM, 0.016 inch spring installed.
I did measure the rouble action roller bearing when I pulled it, outer diameter was 0.223”. The supplied bearing was 0.225”. I am pleased as the web site states, on the page for the
97058-225 Roller Bearing P-07 P-09
I had a few issues, for example, when I incorrectly tried to use the ejector spring in the place of the sear spring and mangled it. I was able to repair it enough to get the operation working but I plan to replace it. I would also suggest labeling the pins and springs as you remove them as opposed to just tossing them in a bin like I did.
Also, reinstallation of the extractor was tricky as CZ doesn’t use a roll pin. It got a little dinged up when I removed it and I had to chuck it in a drill and slightly taper the ends to be able to reinstall it. The firing pin roll pin iwas also dinged up on removal, and I am glad that CGW supplied a heavier duty replacement.
So, after all that, the results:
Double Action fell to just over 8 lbs, with the same quarter inch of take up. I would not describe the double action pole as smooth, but I think this will improve with polishing. If I pull the trigger very slowly I can get six or more out of it, so I think there’s a lot of room for improvement here.
Reset is about a quarter inch, with an audible and tactile reset, then about 3/16 inch of take up , And that about a 16th inch relatively crisp, Single Action break of about 3.5 lbs.
The static single action is about the same, but with about 3/8 inch of take up as opposed to the quarter inch take up after the reset. There is a small touch of grittiness in that final 16th inch of travel, but I would not describe it as having any walls before the break.
So there is improvement. Actually its pretty good at speed, I don’t notice the DA grittiness which is my primary complaint at this point. So, not totally knocking my socks off, but reasonable given the nature and intended purpose of this handgun. If I could get to a meaningfully smoother double action and slightly smoother single action, at roughly 8 lbs DA/3.5 SA, RELIABLE, I think that I would be satisfied.
To be fair, I’m not easily satisfied, but sometimes you need to know when to leave well enough alone.