Author Topic: Grand Power K-100 pistol  (Read 28603 times)

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Offline ck1

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Re: Grand Power K-100 pistol
« Reply #30 on: November 30, 2012, 12:07:20 PM »
Hey guys, I could no longer resist the temptation to buy one of these, as the prices have dropped to being about the same as a decent used Glock (mine was just over $425 from Bud's)...

I've handled (but not yet shot) a few of the STi-branded GP6's, and every single time they've left me thinking "could this be the po' man's Shadow?" (interpit that either of two ways: as in a way cheaper gun that's comparable to a Shadow's awesomeness -or- as in a polymer man's Shadow, as a lighter-weight poly-framed-Shadow is something I'd hoped CZ would have put out by now).

The only question I have is whether or not this Century Arms-imported K100 trigger is going to be up to the level of the STI-imported one's I've sampled? I had read somewhere on one of the forums that STI had requested that the ones they imported got a special trigger treatment (maybe something to do with their sears/hammers), but hoping that the changes weren't really much more than machining the GP6 hammers into looking more like STI's square hammers?

From everything I've read out there, even if the trigger on the one I just ordered is a pound or so heavier, I think I'll still be happy, as the triggers on the GP6's I've played with kind of blew me way.

I've tinkered with Glocks for years, and have gotten better than most at improving their triggers by leaps and bounds, and have shot several that were equipped with some pretty expensive Vanek kits, none were even close to being as good as the out-of-the-box GP6's I've felt. Really the only thing on par that I've tried with a trigger as nice has been a Shadow equipped with a CZC comp hammer and trigger-job (though, the GP6/K100 trigger-reset was way better, even better than any fully-worked-over 1911 I've had or played with actually).

Canuck223, will that x-calibur sear/hammer retrofit into the K100? If so, any idea as to how I'd get a hold of that set-up? Suppose if the trigger isn't as good as I'm hoping for, from what I've read describing the X-calibur's trigger (as being a lightened-pull K100 feel), seems like swapping to that would do the trick to get what I'm after.

I'm pretty excited to put it through it's paces when it shows up. Dawson had all the kit I'll probably need to have it ready to go for IDPA , so it's on the way too: holster, extra mag, extended mag release, and front & rear sights (I'm picky when it comes to sights, the stock ones will most likely get swapped before I even put a single round through the gun). Hopefully changing out the mag release will be self-explanitory (if I even really need to), but if anyone has any tips, please feel free to share...

After the holidays I've been planning to pick up a new Shadow with CZC's SRTS trigger option added. As far as I know, before CZC came upon the SRTS, the K100'GP6's were the only DA/SA platform that did the neat trick of having it's trigger stay back in SA-mode (and free of all the usual take-up slack), CZCustom figuring out how to mimic that trick on a non-firing-pin-block CZ is huge, but the K100/GP6 still has it beat in the shortness of the trigger-reset. Here's the catch though: the CZC SRTS option adds $265 to the price of a $880 Shadow, and I just can't afford to do that right now with the holidays quickly approaching. My plan is that the the K100 will become a back-up once I get the new Shadow, as it's pretty much the only thing out there that operates similarly. The K100 actually might end up being my IDPA gun due to the stupid SSP weight rules, #2 behind the Shadow for USPSA (or #2 for both if the IDPA Tiger Teams come to their senses). That said, there is of course the chance that I may decide to stick with the Grand Power... leaving a lot of $$$ left for ammo ;)
« Last Edit: November 30, 2012, 12:36:32 PM by ck1 »

Offline Canuck223

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Re: Grand Power K-100 pistol
« Reply #31 on: November 30, 2012, 02:22:50 PM »
The only question I have is whether or not this Century Arms-imported K100 trigger is going to be up to the level of the STI-imported one's I've sampled? I had read somewhere on one of the forums that STI had requested that the ones they imported got a special trigger treatment (maybe something to do with their sears/hammers), but hoping that the changes weren't really much more than machining the GP6 hammers into looking more like STI's square hammers?

From everything I've read out there, even if the trigger on the one I just ordered is a pound or so heavier, I think I'll still be happy, as the triggers on the GP6's I've played with kind of blew me way.

Canuck223, will that x-calibur sear/hammer retrofit into the K100? If so, any idea as to how I'd get a hold of that set-up? Suppose if the trigger isn't as good as I'm hoping for, from what I've read describing the X-calibur's trigger (as being a lightened-pull K100 feel), seems like swapping to that would do the trick to get what I'm after.

I'm pretty excited to put it through it's paces when it shows up. Dawson had all the kit I'll probably need to have it ready to go for IDPA , so it's on the way too: holster, extra mag, extended mag release, and front & rear sights (I'm picky when it comes to sights, the stock ones will most likely get swapped before I even put a single round through the gun). Hopefully changing out the mag release will be self-explanitory (if I even really need to), but if anyone has any tips, please feel free to share...


The STI guns were different only in the hammer. The Grand Power hammers are machined. The STI hammers appear to have been MIM'd parts, and had a habit of breaking. My own is still going strong, but I have a stash of Grand Power hammers just in case.

The X-Calibur hammer group can be installed in any of the Grand Power guns, and the X-Caliburs can be set up with the standard system. The only caveat is that older guns may require a new ejector and side plate. The new system requires a new hole for the sear pin. On new guns the hole is already in the ejector and side plates as well as the frame insert. To convert an older STI gun, you need the new sideplates and a shorter sear pin.

For sights, I prefer the Dynamic rear from Grand Power. It's a nice wide flat serrated rear sight adjustable for windage. Grand Power also make a fiber optic front sight set with a .145, .160, and .220 front sight.

If Century Arms expand thier selection, Grand Power market a version with these sights and the bigger mag button called the Dynamic.

For changing out the magazine release, you are just changing the CNC machined part. All I do is press the old one out with a long punch, and push the new one in by hand. There is the groove in the part which you will need to start in the right orientation, but it's easy.

Any problems, just scream.

Offline ck1

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Grand Power K-100 pistol
« Reply #32 on: November 30, 2012, 03:37:53 PM »
^^^Thanks.
How did you get a hold of the X-caliber clockwork?

Offline Canuck223

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Re: Grand Power K-100 pistol
« Reply #33 on: November 30, 2012, 03:49:12 PM »
^^^Thanks.
How did you get a hold of the X-caliber clockwork?

I'm a little north of you. ;)

I had been chatting with the owner of Grand Power on and off since 2007. Canada has a new distributor for Grand Power guns. It sometimes pays to network.  :D 

Grand Power are sponsoring a team of five shooters in Canada, and I wound up in the drivers seat. Along the way, I got a care package of spare parts including an X-Calibur hammer group to test drive.


Offline cz671

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Re: Grand Power K-100 pistol
« Reply #34 on: November 30, 2012, 04:23:20 PM »
ck1 awesome on the purchase, i think you will be surprised what you get outa this pistol right outa the box.  i have owned a glock 26/17L/czpo7/steyr c9-a1, and i can tell you this much i will choose the GP over any of them.  small review of you GP would be cool :)

Offline Canuck223

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Re: Grand Power K-100 pistol
« Reply #35 on: November 30, 2012, 04:54:29 PM »


This is the frame insert removed from the plastic grip frame.



Here is a closer look showing the hammer group.



And here is a side/side view of the different hammer and sear types. The standard K100 is on the left.

Offline Brian Ahearn

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Re: Grand Power K-100 pistol
« Reply #36 on: November 30, 2012, 05:30:57 PM »
My K100 arrived tonight -the double action trigger is nice ,but the amazingly short reset on the single action is unreal ,super short like a fine tuned 1911. Unfortunately I won't get to the range till Monday morning to shoot this one. It nicely made 4 different back straps to fit your hand. Fit and finish is nothing special but its very nice overall I am pleased with this purchase. If it shoots right to point of aim and functions well I know I will turn around and get the compact as well. This one has made a very good first impression with me. Brian /EFR
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Offline cz671

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Re: Grand Power K-100 pistol
« Reply #37 on: November 30, 2012, 08:20:32 PM »
thans for the pics canuk

brian ahearn, good to know so far your happy with the GP.  let us know how the GP shoots 8)

Offline Brian Ahearn

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Re: Grand Power K-100 pistol
« Reply #38 on: December 02, 2012, 12:47:16 PM »
I had enough time this morning to put 4 mags thru it with my son while we were tetsing customer guns before we shipped them back after cerakote work . The K100 out shot a glock 17 and a sig 226 this morning with no sweat . We shoot 8 inch pie plates at 10 yards for final safety test and function. So I threw up 2 extra plates and had a go at it. K100 functioned flawlessly and I was starting to develop a nice hole in the target as it grouped well . Point of aim and impact was right on at 10 yards with Fiocchi and lawman 115 grain 9mm. Very good impression and I thinking i will need that compact version as well I really like the trigger. Very nice practical combat handgun-light weight handled well sights were easy to pick up. I will have to work on extra mags. Brian /EFR
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Offline Skang

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Re: Grand Power K-100 pistol
« Reply #39 on: December 02, 2012, 01:27:16 PM »
hope my local gun shops get those, so I can see in person.

Offline Brian Ahearn

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Re: Grand Power K-100 pistol
« Reply #40 on: December 02, 2012, 02:23:49 PM »
I always welcome customers to go out to the range and try anything out that I have in stock avoids buying something that you might not like after all. I was going to put this one thru some ammo tomorrow as well as 2 others tomorrow ,but due to a little electrical snafu yesterday- we were firing up a custom firearms refinishing oven that I built anyhow we took out some breakers and blew out my phones in the process. Oven works great buy the way after we corrected our wiring snafu-phones on the other hand will be down tomorrow and Tuesday till they are repaired.  So tomorrow I will just have to get a lot of refinishing done instead of taking a break to go shoot this K100 some more. I have to sit and wait for the phone repair guy. So later this week I will spend some more quality time with this pistol and run at least 300 more rounds thru it. Brian /EFR
Easton Firearms Refinishing Owner/Operator
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Offline jdubya87

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Re: Grand Power K-100 pistol
« Reply #41 on: February 12, 2013, 01:39:24 PM »
Zombie thread, but anyone else snag one of these recently? I just got the full size, about to pick up a compact, and hopefully the 45 when it becomes available.

Offline JimThornTX

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Re: Grand Power K-100 pistol
« Reply #42 on: February 12, 2013, 05:29:17 PM »
Zombie thread, but anyone else snag one of these recently? I just got the full size, about to pick up a compact, and hopefully the 45 when it becomes available.

I want one. It's on my ever-expanding wish list. But thanks to the possibility of another AWB I am focusing all my extra income on high-capacity magazines and ammo.
CZ 52
CZ 82
CZ 83 Satin Nickel
CZ 75 P-01 ODG
CZ 75 P-06
CZ 612 HD

Offline jdubya87

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Re: Grand Power K-100 pistol
« Reply #43 on: February 12, 2013, 05:36:54 PM »
Zombie thread, but anyone else snag one of these recently? I just got the full size, about to pick up a compact, and hopefully the 45 when it becomes available.

I want one. It's on my ever-expanding wish list. But thanks to the possibility of another AWB I am focusing all my extra income on high-capacity magazines and ammo.

I think I'll be content for awhile if I can get one of the 45's, and one of the tiny compacts to replace my glock. And a P09. And another P07. And a P01. And...well, you know.

Funny story, the mags on the K100 fit and work in my SP-01. The CZ mags fit, just don't seat. Thinking about adding a notch to all the CZ mags so I have complete commonality.

Offline cz671

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Re: Grand Power K-100 pistol
« Reply #44 on: February 13, 2013, 09:39:28 PM »
Zombie thread, but anyone else snag one of these recently? I just got the full size, about to pick up a compact, and hopefully the 45 when it becomes available.

I want one. It's on my ever-expanding wish list. But thanks to the possibility of another AWB I am focusing all my extra income on high-capacity magazines and ammo.



I think I'll be content for awhile if I can get one of the 45's, and one of the tiny compacts to replace my glock. And a P09. And another P07. And a P01. And...well, you know.

Funny story, the mags on the K100 fit and work in my SP-01. The CZ mags fit, just don't seat. Thinking about adding a notch to all the CZ mags so I have complete commonality.

my shadow mags also fits but dont lock up....before you even start to modify the mags, try removing the polymer floor plate and see if it will lock up, was going to try this but no time yet.  if i have a chance i will do this first.