CS40 Conversion To 10MM

[tlawler]

Got my CS40!

My Chief's Special came in to the LGS on Friday and I picked it up yesterday. Tore it down and giving it a nice Kroil soak for a couple of days. I'll post some pics of it when it's back together. I was asking around at a couple gun smiths at the Local show this weekend and the general consensus was that chamber reaming is pretty straightforward. I found a source to rent the reamer and gauges for less than $50, so I would just need to rent the tools for the smith to use.

 

[tlawler]

Stainless Steel barrels are difficult to machine and special cutting fluid needed.

Actually, the barrel on mine is carbon steel. I checked it last night with a magnet when I was cleaning the Chief.

 

[armorer951]

I believe the barrel in all the CS variants is stainless steel.

 

[tlawler]

I believe the barrel in all the CS variants is stainless steel.

Not mine. It sticks to a magnet really well. Maybe the barrel was swapped out at some point? What other barrels are compatible with the CS40?

 

[oldman10mm]

There are 2 basic types of stainless steel. We won't get into specialized alloys. 300 series and 400 series.
300 series-virtually non-magnetic,doesn't corrode at all,softer and machineable with specialty fluids.
400 series-contains less Chromium than 300 series,magnetic,will show signs of corrosion,harder and tougher than 300 series,more difficult to machine than 300 series.

Stainless Steel FAQs | Mid America Stainless

 

[tlawler]

I did know that some SS was more magnetic than others, but I thought the alloys with less chromium in them were only slightly magnetic. Like not being able to pick up the full weight of the barrel with a magnet.

 

[tlawler]

CS40 and it's big brother

Got the Chief all cleaned up. Did a quick photo shoot with it and big brother 1006 (my Christmas present to myself from forum member epj).

 

[oldman10mm]

for reference

1006 38oz
4013 26oz 3.5"
CS40 24oz 3.0"

 

[toddstang]

Question on gutting the magazine:
Is the follower the only thing you cut down on the sides? The hump at the bottom rear of my magazine keeps the 10mm follower from fitting. Does this get ground off? I do not see any weld spots on the inside of the magazine.
Any info is appreciated!

 

[armorer951]

For those converting the 4013, 4053, I remember having issues with the crimps on the sides of the magazines that secure the spacer interfering with the follower. Had to take a pillar file and remove some material off of the protrusion from the inside of the mag body in order for the follower to work smoothly.

After removing the material, you may need to wrap the file with a very fine wet/dry paper or crocus cloth to polish the places where the protrusions were removed....basically just smoothing the rough crowns on the inside surface. The inside of the magazine should look as clean as possible, and be free of any defects.

 

[toddstang]

NM

Out of stock

 

[toddstang]

Found a local smith (over the phone) that told me he could ream my barrel. He wanted to know the details and I gave him all the info on the gun. He told me that "The gun will be worthless if it works! It will be a snub nose 41 and the barrel for a 40 S&W can't handle that abuse."
I told him about the info on here and he said "The internet hurts or kills people every day." I told him I'd take my chances, just ream the barrel and I'll take responsibility.
Dropping barrel off next week.
Hope a few of you got in on the $25 mag deal.

 

[JohnHL]

Just for fun, last night I installed my 1006 top end on my CS40.

Why?

I wanted to find out if a CS45 magazine would feed 10mm cartridges without any modifications.

You all know by now that CS40 and CS45 magazines and top ends interchange, don't you?

I hand cycled the entire magazine through the action.

I think this means there is no need to mangle CS40 mags.

I've had a CS40 for a very long time, and as much as I enjoy mods to pistols, the CS40 to 10mm conversion is one I would not do for two reasons.

1) The CS40s were the lowest production of the CS models.

2) Even with a buffer, the 10mm cartridge unmercifully batters the aluminum frame.

But hey, they're your CS40 pistols to modify and I commend you guys for taking the initiative.

John

 

[TTSH]

Hope a few of you got in on the $25 mag deal.

Sounds like I managed to miss out on a great deal.

Were those CS40 Magazines?

 

[toddstang]

Sounds like I managed to miss out on a great deal.

Were those CS40 Magazines?

Yes.
Southern police equipment.
$25 new in package.
Have a feeling we may be seeing a bunch for sale for a premium real soon.
I just bought what I needed.

 

[TTSH]

Yes.
Southern police equipment.
$25 new in package.
Have a feeling we may be seeing a bunch for sale for a premium real soon.
I just bought what I needed.

Damn!!! Why didn't you let me know?

That shows what happens when you don't keep up on every thread!

 

[oldman10mm]

shows them as still available !

 

[TTSH]

shows them as still available !

Their inventory is obviously not live. You can put in an order for 1,000 of them and the order still processes... ... but I doubt they have that many. I wonder how many they do have?

I think I better call them first thing Monday morning!

 

[toddstang]

I talked to them on Thursday and they said they were all sold but online was still showing in stock. I think their IT guy was off or something. I put a link to the site when I found them to help you guys out but took it down when I found out they all sold. Person I talked to said if they find more they will post them up.

 

[TTSH]

I talked to them on Thursday and they said they were all sold but online was still showing in stock. I think their IT guy was off or something. I put a link to the site when I found them to help you guys out but took it down when I found out they all sold. Person I talked to said if they find more they will post them up.

Got it! Thanks!