Thinking about chopping my P-07 Duty

[Bdubbs]

I love my P-07s. At 5'4" 150lbs I can conceal a subcompact grip better.

I'm thinking about cutting my old P-07 duty to accept P10S mags. I've already done this to a PPQ with P99c mags so it won't be my first rodeo. People do it to Glocks quite often.

Chop the frame, trim the main spring, maybe take a little off the hammer strut? Has anyone here done this already? Pics, insights, words of encouragement/discouragement? I want your opinion.

[DOC 1500]

Keep it covered, nobody knows what's underneath your shirt.

[Skookum]

If you're ever forced to use it in a Left-leaning jurisdiction, you may well have to defend yourself against an allegation that your chopper is unsafe.  With such an extensive modification, I wouldn't want that unnecessary burden.

[boatdoc55]

Get's my tummy queezy talking about chopping up a CZ, any CZ!!!!

[CCWLearner]

I love my P-07s. At 5'4" 150lbs I can conceal a subcompact grip better.

I'm thinking about cutting my old P-07 duty to accept P10S mags. I've already done this to a PPQ with P99c mags so it won't be my first rodeo. People do it to Glocks quite often.

Chop the frame, trim the main spring, maybe take a little off the hammer strut? Has anyone here done this already? Pics, insights, words of encouragement/discouragement? I want your opinion.

Pretty sure someone here chopped a P-09 grip down to create a long slide P-07 and posted some photos of it a few years ago.  Don't recall anyone chopping a P-07 grip down to P10S size.  Obviously you're going to need to come up with a shorter hammer spring and hammer strut, and drill a fairly precise hole to hold the mainspring plug in with the pin.

[z0mbi3]

Hey Bdubbs,

I absolutely think you should give it a try. Only problem is I think there’s a little homework involved.

First thing is first. Check out the following thread.

https://czfirearms.us/index.php?topic=85228.0

This has been done before. The thread has a picture of a chopped P-07. From what I have gathered from the limited information on that chop was that the man used rami mags. This is important to consider because the man maybe used other Rami parts to make it work?

How about comparing a Rami hammer strut to a P-07. I’m sure some users on the site won’t mind posting pics side by side. Possibly use a chopped P-07 hammer strut and a Rami hammer spring? If my research is correct, the Rami uses a CZ 75 B standard hammer. This means the hammer has not been modified for such a short hammer spring. So, in theory if the Rami hammer is from a full sized pistol, the chopped P-07 can run off of the same hammer, even with a short strut and spring.

If I’m wrong about the hammers being interchangeable on a Rami and a 75, please let me know. I’m all ears.

As to measure where to drill the grip pin… That’s the harder part. I’d guess you’d let the mag length determine where to drill for the pin. If that man in the thread with the chopped P-07 used Rami mags, maybe it would be worth comparing rami and P-10S mags as well?

The last concern is would you use the same hammer spring plug? I think the hammer spring plug length would be the variable that would require testing. Leave it full length and if the hammer spring/strut doesn’t have enough room, shave down the plug little by little until it’s fully functional.

But I’d like to do this and I think it could work. I just don’t have a P-07 lying around to try it. But I do think it’s worth an attempt. If you’re not going to be destroyed if the project fails, you should do it. But that’s just my .02. If you do get it to work. I’ll be doing it myself after I grip chop a P-09.

Thank you!

z0mbi3

[Bdubbs]

I appreciate the feedback. Thanks for linking that thread z0mbi3.

I've made up my mind. I'm doing it, as soon as I have the time. I'll post pics when it is finished. 

[DOC 1500]

P-07 is already short, why would you want to chop it? Never mind personal preference I guess 🤷. wouldn't be me.
Bigger the better nobody knows what's under your shirt.

[z0mbi3]

Hey Bdubbs,

Any news on the chop, yet? Is there anything holding you up?

[M1A4ME]

I'm a big guy.  Tall and round.  I can agree that the first thing that shows that P07 is the grip frame sticking out against my baggy button up shirt when I've been in the car/truck and it slides rearward/tilts rearward due to sitting in the vehicle seat.

So a shorter grip frame would be easier to keep "hidden" under the shirt.

My concerns would be functioning and how well I could hold it in my hands to shoot it.  I have two small grip frame guns.  An M&P 9MM Shield and an FNS-C in .40 S&W.

The Shield is able to shoot awesome groups.  Not just awesome "for it's size."  Awesome as compared to other full sized 9MM guns I have had.  It's right there with some of my CZs at 7 yds.

The .40 FNS-C?  Nah.  Me and the grip?  Or the gun?  I have no idea.  A 9MM would have less recoil.  I had to put some Talon grip panels on it to help me hold on to it better.  Probably wouldn't be an issue with a 9MM.

Sometimes what feels odd in your hand, or not "the best" still shoots good.  Like my P07 .40.  Not as comfortable as the P01 but shoots better groups for me, so I realize a chopped P07 might not feel "right" but might still shoot good groups for me.

Why did I buy the FNS-C?  It's a 10 round magazine pistol.  At the time our state legislature was threatening to pass a 10 round mag. limit in VA.  To me the idea of carrying a 15 round 9MM pistol, or a 12 round .40 pistol with only 10 round magazines in it seemed crazy.  The FNS-C would have become one of my carry guns if they'd passed that law.  In a 10 round mag. limit state a chopped down P07 would be a better fit.  Why carry a big gun with a long magazine only partially full of ammo?

I'd say go for it if you've got the pistol, the time, the confidence that you can make it work.  If you can, take lots of pictures along the way.

[CZMikey]

I know it ain't a CZ, but look at the Sar USA B6c.  13 round, 3.8" bbl, poly frame and only $400 ish.
Good luck with the chop job if you do follow through.   

[z0mbi3]

M1A4ME,

You share the same concern I have. I am also concerned about how reliable it would be for functioning. But, if CZ was able to use a standard hammer with shorter components in the Rami, then I have no reason to believe this wouldn’t work. Maybe measure the spring uninstalled and installed, measure the length of the new compressed spring channel, do some math and find the uncompressed spring length? Again, in theory that should work.

And how cool would it be to have a full length P-07 slide on a chopped grip? I have a feeling this may be an alternative to the now discontinued Rami for those of us who don’t mind modifying a bit.

CZMikey,

Thank you for sharing about the SAR B6c. But my only concern is it doesn’t have much of a size difference from the P-07 in general. Not too much to gain.

[DOC 1500]

And I'll say it again,
NOBODY KNOWS WHAT'S  UNDER YOUR SHIRT !!
I also say this because over in general discussion I posted the question ....
has anybody asked you what's under your shirt? So far there are 40 + answers that say NO !!

[Bdubbs]

Update:
I still intend to go through with this.

I always planned on doing the mod after I got my P-07 suppressor ready back from having an optic cut. Well, I sent that slide off the same week as my OP and it return shipped yesterday. That's what I get for requesting black nitride.

Anyway, I have no concerns about reliability. Not enough of the moving parts will be touched to give me any pause. I picked up a couple magazine grip spacers off Ebay a while back that are the exact dimensions of the material that will be removed from the frame. That will be a huge advantage to me when I start cutting. It'll also allow me to carry a 15 rnd mag as a spare or a 19 rnd mag if I use both spacers. I've also got a pinky extension base plate from cz-parts.com so that should take care of the shorter front strap real estate on the P-07 frame (compared to the P10S, due to the larger trigger guard on the 07) without bringing the grip length back to normal (which would make the whole endeavor pointless, obviously). The only hard part will be drilling the hammer-spring-plug retaining-pin hole, like Mr. CCWLearner and Mr. z0mbi3 alluded to.

I've had a P10C OR and a P10S OR for a couple years now and I am always surprised at how much easier I can conceal the 10S over the 10C, especially with a dot on top. It basically disappears. I plan to swap the optic cut 07 slide between regular frame and chopped frame depending on my wardrobe. I live in a temperate climate with four distinct seasons so my wardrobe varies quite a bit throughout the year. And to address Mr. DOC 1500's concerns, I've worked with and for people who absolutely would have no problem asking me what I've got in my waistband. I would prefer to not print at all if I can. I have the means and capacity to do so and I like doing this sort of thing.

[M1A4ME]

When you go from the "full sized" P07 to the chopped model/version you're going to have to get used to it.

Used to how it feels on your hip and how it feels when you grip it/shoot it.

If I carry the FNS-C or the Shield I find myself suddenly thinking I've lost my pistol when my elbow/arm aren't bumping into it as I walk around.  I get a little "fright" that it's not there till I make a concerted effort to bump it as I swing my arm past while walking.  That might go away if I carried them all the time. 

When you shoot it you'll have to be sure you keep a good grip on it.  Two things can happen.  One is similar to limp wristing resulting in the pistol not ejecting/feeding/chambering correctly.  The second would be the pistol moving enough that you find yourself having to "re-grip" the pistol every 3 or 4 shots.  With a 9MM that might not be as much of an issue as it has been for me with the P07 with the original grip surfaces, the hard recoiling .40 ammo I carry and lots of sweat on my hands on a really hot/humid day.  Just be on the look out for either if you run into issues after the mod.