5906TSW Replacement Barrel or 4006tsw conversion?

Thank you, DMcBB, for starting this thread and posting your results. I just picked up one of those late production 5906TSW barrels from MidwayUSA while they had a few in stock again. Coupled with a 5906 magazine, this will make a nice conversion kit for my CHP 4006TSW.

Randy
 
Awesome! Let us know how it works for you and if you have any extraction issues.

My sample size of one isn’t really enough to understand if this conversion will work consistently on other pistols. Plus, as some of the pros on this board like Fastbolt or BMCM have said in other threads, the 3rd gen extractors almost always require fitting so that the extractor will function reliably in a particular gun. As a result, each slide/extractor combo may be a little different.

I wonder if the .40 extractor that I have in my 4006tsw is in some sort of sweet spot that allows it to function well for both .40 and 9mm while others may not be so lucky, or if they would just always work, similar to how a p226 can be converted from .40 to 9mm with a conversion barrel but no change to the extractor.
 
Ammo First said:
I want to give this a shot. Can you give a update on your 4006tsw 357 sig conversion ? Thanks
Click to expand...

Not much to update about the 357 sig conversion.

I shot it the other day. It speaks with authority. :cool:

If you decide to try it, here are a few of my personal opinions about the job:

I got a finish reamer from Dave Manson Reamers, bought a bottle of pipe threading lube, and went to town.

Mind you, this is not like the pansy job of reaming a 40 barrel to 10mm.
On the 40/10 conversion, you're only removing a "fat" 1/8 inch.
Turn the tap handle once and wipe your brow. :D

On the 9mm/357 sig conversion, you're plowing steel the entire length of the cartridge.
Pack a lunch and bring plenty of cool soft drinks to keep yourself hydrated! :D

And don't forget to save the chips of steel from the barrel in case you change your mind and want to go back to 9mm. :rolleyes:

Seriously, ream the chamber, chamfer the chamber mouth, have the old caliber designation fill-welded, smooth the chamber top, have 357 sig laser engraved on the chamber, and finally, fit the barrel to the pistol (if needed).

I went to heavier springs (22lb recoil/22lb main).
Getting the grip on with that new, heavy mainspring is a bit of a struggle.

I converted 2 5906tsw barrels.
One for 4006TSW and one for 4006 (standard).
You must change the barrel cam angles to work with the standard 4006.

Because of the high pressure of the 357 sig round, I am hesitant to use these barrels in any of my aluminum frame 40s. :eek:

Perhaps I am being overly cautious.

BTW, as I mentioned on another thread, I tried the TSW 357 sig barrel in my CHP 4006TSW and the hood was too long although it fits just fine in three other TSW 40s.
I could stone the hood back a little to get it drop free, but I have other 4006TSWs to run it in.

(See next post for the CHP 4006TSW 9mm conversion.)

Good luck!

John
 
I want to give a shout out to the OP (DMcBB) for inspiring me to try the 9/40 conversion.

I knew the 5906TSW and 4006TSW barrels would interchange but I never shot it that way.

Anyway, Sunday was a colorful fall day up on the ridge, so I decided to shoot my as yet unshot (by me) CHP 4006TSW.
(The CHP shot it plenty! :eek:)

I remembered I still had an unmodified 5906TSW barrel and tried it in the CHP 4006TSW.
It fit and dropped out with no hood stoning.

So I loaded the CHP mag with Federal 180 gr FMJ and loaded a 5906 mag with Federal 115 gr FMJ and went out to the back yard.

Shot the mag of 40 with no problems, then switched the barrel and magazine to the 9mm components and shot the mag of 9mm no problem.

They both shot to the same elevation just left of POA at 11 yards.

I have plenty of 9mm pistols and have absolutely no need for this conversion (or for that matter, practically all of the other conversions I have done) but the Dr. Frankengun within me just could not resist and doggone it, IT WAS FUN!!!

John
 
Erocksmash said:
Wouldn't the breach face from 9mm to .40s&w be an issue ? Regarding the extractor/extraction? Please correct if I'm wrong ?
Click to expand...

40 breech face is approx. .6mm (.024") wider than 9mm.

Since most extraction pressure comes from blowback (when firing), the extractor doesn't need to work that hard.

Whether or not the 40 extractor would have sufficient purchase on the 9mm case rim in a marginal (and possibly desperate) situation like a round sticking in a dirty chamber during a shoot out :eek: is a difficult question to answer and would NOT be a situation in which I would choose to be.

In other words, Range Use Only!

John
 
Just as an FYI, I brought my 4006tsw out to the range again and ran about 100 rounds of 9mm through it with the 5906tsw barrel, and again it functioned without any issues and experienced no malfunctions of any kind. As I said before, this configuration wouldn’t be my first choice for use in an actual crisis situation, but for range use it’s fun, easy to manage, and cheaper to shoot than .40!
 
Last edited:
After reading the early part of this thread, I got onto the notify list at Midway and soon was notified that 5906TSW barrels were in stock. Ordered, fit and tried shooting in a CHP 4006TSW. As noted above, no issues at all using a 5900 magazine. Accurate enough for an old man at the range. Now these guys have me thinking about a .357 Sig barrel!
 
I am on waiting list at Midway for one.
OLD_COP You must have got one of the few that came in.?? I ordered mine on Jan 5th and they were backordered. $93 plus shipping. Mine is for a 357 Sig conversion that BMCM will square away. I would buy a 2nd for 9mm triple threat but that's what the 5906 is for.. maybe I should get it anyway just to complete the hat trick? That sounds like phase 3.
 
I was wondering if BMCM would be interested in converting 9mm barrels for all the members that would like to have one done at the same time? Instead of having to rent a reamer for each job and if the reamer would hold up to the task of several barrels?
 
So I’m curious, is a specific TSW barrel required or will any 5906 barrel work? Because I have one without the loaded chamber indicator that won’t allow the slide to go back on. Anything I’m missing besides trying to use a different barrel?
 
vblue42 said:
So I’m curious, is a specific TSW barrel required or will any 5906 barrel work? Because I have one without the loaded chamber indicator that won’t allow the slide to go back on. Anything I’m missing besides trying to use a different barrel?
Click to expand...

Needs to be a TSW barrel, as the unlocking ramp angle is different on the full size TSW guns compared to standard 5906s. Also uses a different profile at the end of the barrel for the .40 bushing
 
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