My CS9 “Chiefs Special” Mods

Mercs

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I wish I started this earlier, but I didn’t know I was going to go this far. Sometimes one or two mods turns into an ongoing project. I don’t have pictures of everything I did, but I can point out some mods that make the CS9 even better. First of all let me say that I have shot many of the best pistols on the market, and nothing beats the CS9 for me on a deep concealment level. This thing is 100% reliable, accurate, small (even smaller with some mods, but we’ll discuss that later), light while having steel slide w alloy frame, 7+1 9mm, and sporting DA/SA with a decocker! Mine also came with factory night sights (late production stainless model) Checked all my boxes in order to retire my S&W 638 from duty. Not that I can ever leave well enough alone...
Some things to gripe about:
1) Trigger pulls are rough. DA over 12lb, SA around 7-8lb.
2) Decocker sticks out pretty far off the slide, and mine came with ambi so that made it too much for me to live with
3) Tough to insert mags. Mags will not drop free.
4) Hogue factory grip is too girthy for concealed carry
5. Can’t reach the slide stop without adjusting grip (semi-stubby thumbs, but I’d wager it’s a stretch for most people), so that it makes much more sense not to use it, and just slingshot the slide

Here are pictures of the gun in the condition I purchased it in. I got it at a pawn shop with 2 mags for $425, case not included. Consider the cost and methods used to manufacture this gun. It’s an incredible value, just like most third gens
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I’ll start with the frame. I polished it with some tender loving care. I use a combination of sandpaper from 400-1000 grit, small files of various sizes to wrap the sandpaper around to fit into tight spaces, 0000 steel wool, cutips, and dremel polishing tips with Flitz.

I lightly sanded the rails, careful not to remove too much metal. Just flip it upside down and make even strokes against sandpaper placed on a flat surface. I polished the pin holes, frame around the trigger, inside where the trigger bar rides, the entire inside surface wherever the magazine contacts (made my mags “drop-free, seriously the mags just glide), inside the hole where the trigger return spring is held captive, the notch that makes contact with the recoil spring guide and “nipple”, where the sear contacts the frame, where the hammer and levers contacts the frame, and where the disconnector lives. Some photos of this below
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bought a CS9 a few weeks ago. I didn't like the fatness of the grip but i liked the feel of the rubber it had. My gun came with 2 new sets of "Big Dog Grips" also. Much thinner but hard plastic and slippery. Put Talon rubber grips on one set. I had to cut them myself as Talon didn't have them to fit the cs9. Turned out really nice, grippy and much slimmer. On the other set i put one coating of Boot Guard. Saw that on the forum awhile back and i had used it on the toes of my work boots previously. That worked out really well. "grippiest" grips i've ever felt. They are the ones staying on my cs9. I pocket carry it so it made for a better purchase getting it out of my cargo pants. Love the gun! it exudes quality! I'd post pics but i'm a lot of things and unfortunately tech wizard is not one of them.
 
My CS9 Mods

On to the grips. The rubber Hogues are so beefy, they allow a firm grip and sure soak up recoil, but they’re too large for my purposes. I saw on this forum the Big Dog grips, modified by a forum member from the Delrin grips that come on other third gen smiths. I used a 3913TSW grip and pin that I had bought for $13. I won’t go into detail on this as there’s lots of good info on this forum already for that. I essentially ground out the inside with a rotary cutter and also had to take some off the main spring retainer. It’s ok, I have more oem retainers lol. Repeated fitment process a little at a time, removing and reinstalling the grip until it was gtg

I could’ve left the bottom part that is usually flush with the mag base, but I chose to chop the grips across flush with the bottom of the frame. The result yields a nice thin profile that won’t stick out when carrying concealed.

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But look, that pinky entension on the mag base sticks out a bit too much for my liking now. I’m talking deep concealment here. I also want to be able to throw this in my pocket just like my j frame. I needed a solution to this problem.




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I agree that the CS9 is the finest deep concealment 9mm made. By anyone.

Mine has a great trigger, is very accurate with my carry round (RA9b) and 100% reliable. It is flat and light and a joy to carry.

The only modification I made to mine was the addition of TercGen grips. Which, IMO, should have been on this fine pistol to start with. My CS9 is my most carried hot weather, deep concealment, "gun for when I cant't have a gun" pistol. Regards 18DAI
 
Great job!
I’m just beginning my CS9 journey. I’m now on TercGen’s wait list for grips. Have done similar polishing and action clean up to my 3914, 908 and a couple of 2nd gens but this has given me a few new ideas.
It’s nice to see someone else’s work to learn some things I have missed.
Thanks for sharing.
 
Great job!
I’m just beginning my CS9 journey. I’m now on TercGen’s wait list for grips. Have done similar polishing and action clean up to my 3914, 908 and a couple of 2nd gens but this has given me a few new ideas.
It’s nice to see someone else’s work to learn some things I have missed.
Thanks for sharing.



Congrats! I have done a LOT more to the gun, that was just the beginning. I can’t believe how soft this little pistol shoots, it’s just AMAZING and they don’t make it anymore...very sad. My wife keeps eyeballing it. She calls it the Chefs Special [emoji849]
I’m still getting pictures organized, and will post some more later today. I also added some more “Before” photos


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Here it is in the CS9.
I think that I had to sand the front down a little.

like the look of the grey grips....I wonder if there is a "grippy" paint a person could use to spray the black "Big Dog" grips and make them less slippery. Seems i need more grip as i get older to control whatever i am doing with my pistol
 
Continued from the last post about the mag base... I found the photos I took after these mods.

So, after searching this fine forum for a solution, I came up with two options for the mag base pinky extension.
1.) I found a 3913 TSW 7rd mag on eBay for a great price. This came with the flat base plate I desired. Alternatively you can buy the 3913 baseplate. It does take a bit of sanding on the nose to get it to be flush with the front strap.
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2.) the Kahr base plate mod. Can be found by searching this forum. It may allow for over-insertion of the mag, but I don’t think it’s an issue, especially if used as the primary and not the backup mag. I’ve tested it while squeezing up with my pinky to try to make it jam, but it worked flawlessly.
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Congrats! I have done a LOT more to the gun, that was just the beginning. I can’t believe how soft this little pistol shoots, it’s just AMAZING and they don’t make it anymore...very sad. My wife keeps eyeballing it. She calls it the Chefs Special [emoji849]
I’m still getting pictures organized, and will post some more later today. I also added some more “Before” photos

Chefs Special! Lol. I’m using that.
Hope I can document some of my Chefs evolution to share here too.
Thanks!
 
Here it is in the CS9.
I think that I had to sand the front down a little.

The blued parts and the grey grips look fantastic on yours!
Mine is an early blue/black with non ambi safety (bonus!).
I would have preffered stainless but I can’t complain about the price I paid locally.
 
Next up is the slide assembly. Again, I wish I had thought of documenting all of this initially, because I would have taken even more photos.

I stripped it completely. Had new springs for firing pin block, magazine safety, and ejector. Should have got a new ejector also perhaps. Anyways I cleaned everything inside the recesses and such, and found MUCH gunk in the cutout for the ejector, as well as the FPB plunger and magazine safety channels. Keep in mind that you have to remove the rear sight to access the FPB plunger/spring and magazine safety plunger/spring, and neither one of these has any effect on trigger pull, as far as I can tell. I did the work so I could know the springs are new and everything is clean internally while I’m carrying, since I bought the gun used and it’s an old gun. Anyways I then proceeded to polish the firing pin (Flitz only, no sanding) and also its channel in the frame,
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the breech face,
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the ejector (and don’t forget the pin hole in the ejector so there’s less friction),
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the FPB plunger, the groove for the decocker safety,
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and the notch where the safety detent rides when you flip it down and up
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And the barrel bushing and recoil spring channel.
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I then did the recoil spring guide rod. I also twist up some 0000 steel wool and smooth the inside and outside of the spring coils, since I’m already going overboard. I NEVER polish springs at high speed, I only use steel wool by hand, so I don’t heat the springs up!
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I touched on the underside of the barrel hood a bit with some fine sandpaper to aid feeding of rounds into the chamber (I always soften this a bit to reduce the odd chance that a bullet hits the hood at the wrong angle and then doesn’t feed properly, but this is personal choice based on my experience), I then polished the chamber and feedramp as well as the lugs. I polished the outside a little bit, but taking material off the outside of the barrel is also touchy work, so I didn’t go crazy on it.
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I then hit the Safety. I like to soften the edge of the safety that pushes back to cock the hammer as the slide cycles (with some sandpaper) before polishing. This is one of those commonly overlooked details that can contribute to smoothing the action of the pistol. Do not remove any metal from the slots, no sandpaper or stoning those or you can destroy its functionality. I use Flitz only on the slots
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That concludes the slide portion. Next up is the mods I have done to my controls, and then I will go into internal components.
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Here is a sneak peek at one of my mods:
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A CS9 is high on my list. This thread makes me want to jump in the car and drive the 2.5 hours to look at one that just popped up for sale. :)
Yeah, tell me about this one that's 2.5 hrs from you....that's about how far away I am from Davidson, NC. Seriously, if you don't go get it I may be interested in it.
 
I use a rubber grip sleeve over the TercGen grip and a 3913TSW mag with flat baseplate to facilitate deep concealment and pocket carry.

A DeSantis Nemesis holster for IWB and pocket carry and a Don Hume JIT slide for belt carry. Regards 18DAI
 

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Next up, it was time to deal with the ambi decocker that sticks out way too far on BOTH sides for my purposes. I don’t use it as a safety; I like to carry in DA. I found a single sided decocker at Numrich and although it set me back about $50, I felt it was worth it. I may also decide to sell the ambi one to recoup some of the cost. Here is my ambi next to the new single sided decocker.
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Having the lever on one side reduced the slide profile significantly, so much so that I realized I could really slick this up if I melted the lever a bit. So I took a grinder to it, and then filed the last bit, then sanded and polished. I tried to reblue it at first, but the bluing wouldn’t take as well as it did when I shaved down top of the front sight to raise the POI. The polish should hold over time with maintenance.

I then did the same thing to my slide stop next; I can’t reach it anyways, and I got jealous when I saw GaryS rocking the low profile slide stop from Numrich. I made my own shadetree version, as seen here
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