smokemup
Member
It's done, and finally got to the range today for the first shots with my 10mm converted CS40 today. All I can say is "Wow!" What a great little shooter. Recoil was easily manageable but I didn't use full power ammo. I started off with Armscor 180gr FMJ, which is fairly tame, then moved up to the PMC 170gr JHP. The PMC was obviously more potent, but short of the power of, say, Underwood 10mm ammo. I didn't take any Underwood to the range today, but the next time out I'm going to give it a try.
The conversion was simple. I sent the barrel off to be reamed and headspaced for 10mm, and I gutted a couple of the CS40 magazines to accommodate the 10mm length. I used followers from the S&W 1076, but had to cut the sides down a bit to clear the 'humps' near the top of the CS40 mags.
I had already performed a trigger job on it to minimize the SA takeup. The recoil spring I used was from Wilson Combat. It's a 22# flat wire spring which is a little longer than the stock spring, but it fit well and still allowed the slide lock to function, so I didn't cut it down. The part # is 10SEN22, made for their 1911 Sentinel. Another company that makes flat wire recoil springs is ISMI, and you can use the 20# Sig 239 recoil spring. Part Number is GC26.
Here's the trigger video:
[ame="https://www.youtube.com/watch?v=f0Z100eQVU0"]CS40 Trigger Job. SA Takeup.[/ame]
In summary, it's a great little gun to bump up to 10mm and feel confident that it will work. So far there has been no failures of any sort, and those rubber grips really make shooting a 10mm a non-painful event. Awesome.
If you plan to carry this 7+1 gun, which is very doable, you could replace the rubber grips with a thin plastic S&W grip from the 4013 and cut the bottom to fit. You'll need to use the mainspring pin and not the original grip screws to secure it. You'll also need to get the longer pin from those models, which use the mainspring pin, but you'll have to drill holes in the modified grip to accommodate the pin. Check with Numrich and others.
If you want to do this to your CS40, here's the info for the barrel work (it was $65 + $10 to ship). Turnaround was 2 weeks.
Van Schneider
The Gunworks
534 Scott St
Sandusky, Ohio 44870-3735
The conversion was simple. I sent the barrel off to be reamed and headspaced for 10mm, and I gutted a couple of the CS40 magazines to accommodate the 10mm length. I used followers from the S&W 1076, but had to cut the sides down a bit to clear the 'humps' near the top of the CS40 mags.
I had already performed a trigger job on it to minimize the SA takeup. The recoil spring I used was from Wilson Combat. It's a 22# flat wire spring which is a little longer than the stock spring, but it fit well and still allowed the slide lock to function, so I didn't cut it down. The part # is 10SEN22, made for their 1911 Sentinel. Another company that makes flat wire recoil springs is ISMI, and you can use the 20# Sig 239 recoil spring. Part Number is GC26.
Here's the trigger video:
[ame="https://www.youtube.com/watch?v=f0Z100eQVU0"]CS40 Trigger Job. SA Takeup.[/ame]
In summary, it's a great little gun to bump up to 10mm and feel confident that it will work. So far there has been no failures of any sort, and those rubber grips really make shooting a 10mm a non-painful event. Awesome.
If you plan to carry this 7+1 gun, which is very doable, you could replace the rubber grips with a thin plastic S&W grip from the 4013 and cut the bottom to fit. You'll need to use the mainspring pin and not the original grip screws to secure it. You'll also need to get the longer pin from those models, which use the mainspring pin, but you'll have to drill holes in the modified grip to accommodate the pin. Check with Numrich and others.
If you want to do this to your CS40, here's the info for the barrel work (it was $65 + $10 to ship). Turnaround was 2 weeks.
Van Schneider
The Gunworks
534 Scott St
Sandusky, Ohio 44870-3735
