I wanted this gun for 10 years , I just got a nice one looked great and I checked the decock leaver it was tight no problem I could see , lubed up took gun out and it ran very well . I only ran 50 or so Win 165 . looked down and no right side decock now what ? that will drive me crazy till I get what I need to fix . I dont care how much . It looked right and I looked it over I saw some one ealse lost one also .

You need the spring, plunger, and lever. Check Midway, Brownells, and Ebay. Numrich as well. You might not get them all from one place. If all else fails, PM me, I should be able to provide you with the plunger and spring.

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I just ordered this same pistol from Copper Custom. They are back ordered. Hopefully not for too long


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The gun I got is a nice clean one it was issued but not much wear at all , still had the red painted safe dot on some are gone from being ultra cleaned to much . I got the gun with 3 mags and my holsters for Sig 229 with rail and some Glock holsters fit perfect. Black leather right hand open top .

Gary I sent you a message on the parts . I do need them . jhajaa@nmax

Bear in mind that the older ambi levers for the 9/.40 slides were machined differently to accept the older ambi lever plunger. The newer levers are machined to accept the newer plungers. (The springs remain the same.)

The older ambi lever plungers looked very similar to the "body" plunger, having a machined shoulder and semi-flat head (versus the fully rounded head of the body plunger).

The newer plungers are straight-walled (cylindrical to the top, with no machined shoulder below the head), which gives them a wider, flat head ... and the ambi levers are machined to fit.

Mixing the ambi lever & plunger revisions won't result in the intended fit.

Also, unless they've changed it in the last several years, the 9/.40 slides with the spring-loaded decock-only assemblies use the .45 ambi lever, which has an added bit of steel "pad" which serves as a "spacer" against the outside of the slide, to help prevent lateral (leftward) movement of the decocker assembly's body.


It's just a guess ... but if someone were to have used an old style ambi lever on a new 4006TSW (because they somehow lost the new one, and just got hold of an old one from an earlier 4006, for example), the new ambi lever plunger wouldn't properly fit inside the recess on the inside of the old lever, and the lever probably wouldn't be securely held (probably being subject to be pushed out from the end of the body assembly).

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Okay, I just went out to the bench and took some cellphone pics of the different plungers.

The middle plunger is the original ambi lever plunger. Note the small head.

The left (or bottom, depending on the pic orientation) plunger is the manual safety/decocker "body" plunger. Note the fully rounded head.

The right (or top) plunger is the revised style ambi lever plunger. It may also have been the original .45 ambi lever plunger, when they went from screw retention of the ambi lever to plunger retention (one of the 645/4506 transitional revisions), but I can't remember at this point. It IS the current 3rd gen ambi lever plunger for all calibers.

The pics present the plungers from different angles, in close-up, but the difference between the body plunger and the original ambi lever plunger are much less obvious when just looking at them at first glance (and without glasses or magnification).

The reason the spring is plain "color"/finish (not painted light blue) is because it's from an early 3rd gen made in '89 or '90, so whatever paint may have been present is long since gone.






So, you can imagine how the different ambi plungers require different machined recesses in the back of the levers, and why it's important for them to be matched to the same vintage/design, so they fit together properly.

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FWIW, the plunger body I have for triaxle is the straight sided one with the small bevel at the top. As Fastbolt notes, using the earlier plungers with the later lever will result in a very loose fit. It will work after a fashion, but when I did a trial fit (before I read Fastbolt's last two posts) my thought was that it was very loose and likely to result in a lost lever, spring, and plunger.

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What would this forum be without fastbolt?

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Sure you did

Send it , give me your info and I will send it to you Sun .

You guys will never believe this , I was at my 4 year old grandsons bithday party and we came home I kept thinking about how I was seated on my Atv last night and how much force was with the slide kept thinking went back up to my range which is all grass . Prayed he wants to know all concerns . I jumped off took two steps looking BOOM it was there found the leaver .

Excellent information, please be aware that the past 3 years as parts became scarce.... There was a probability that plunger and springs used may not have been for the current 4006TSW, salvaged from old 4006 parts and what not. I would urge everyone buying to check and make sure the spring and plunger are proper. When these parts come off during shooting, they are hell to locate.

Noticed on a related thread that the CHP 4006TSW's have some differences from the same vintage production 4006TSW's we were getting. Interesting, but not surprising, as sometimes a special production run for a large agency could receive some revisions requested (like the guide rods in the original 4006's they got).

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Speaking of parts. How much of a parts supply did the CHP armorers have, and will those parts be sent back to S&W once all of the 3rd Gens are traded in?

What is the time frame for completing the transition?

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Can open, worms everywhere.

That's hard to answer. Speaking from an area office in Los Angeles we had a good supply of spare parts about 5 years ago, but as the supply line came to a halt it seemed like everyone was trying to get parts from other offices. Parts just dried up. Surprisingly it was the plunger/spring right side decocker that was the main culprit. Being able to see these guns come in and some that saw hard use, they are very reliable. I'll see if I can get an answer to "parts" for you.

Completion of the transition is slated for 2019, obviously sooner would be better. That's dependent on a few factors like - weapons shipments and scheduled training plus running concurrent academy cadet classes.

Gary your payment is on the way for the spring and detent , I looked for hours and can not find any black right side leavers any where . I checked 20 places

The lost decocker lever is interesting as that's what happened to triaxle. I guess his situation isn't unusual at all, which is unfortunate.

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Can open, worms everywhere.

I did get a nice gun not much wear at all and I did look at the decock and seemed ok when I got it .. I may end up with two . I have the older CHP gun and never a problem a gun guy must of had it . Has a real smooth trigger .

I did find a 4516 tactical complete slide would parts from it be the same and would the safe decock levers be the same length or shorter on the 4516 tac ????????

My gun is CHP5xxA with a control number E5xxA is this a middle of the run gun ? early or later issue?????????? its clean and not a lot of ware.

Somewhere I read that after 0001-9999, the "A" was added on for the next 9,999 guns. There is no way to know the issue date, they probably just gave them out in the order they received them from S&W and were stacked up on the armorer's shelf. I am sure some numbers like CHP0001 and CHP1929 (the year CHP is formed) were set aside and won't be seen on the market.

To insure you never loose it again , buy a complete set of replacement parts. I have discovered that by having replacement parts , paid for and on hand , that pretty much guarantee's you won't need them....and if you ever do need them...ya got em .

I do that and have some Smith parts ,side plates and screws 4006 stuff grips springs but not This . I have AR stuff also the buffer tube spring and detent looks like you could maybe .

I was way off on thinking ar buffer detent and spring . I have some stuff on the way .my gun was in very nice cond but had a silver right side decock lever put on at some time in its life . which I looked and looked and found in the grass .everything else is black

Thanks to Gary S . I got mine back up going put new spring and plunger and new type leaver with the extended pad , I put gun in a baggie and when I put it together it kind of snapped in , it seems tight ,good to go .

TRIAXLE, I'm in the process of moving, so stuff is everywhere...I have black levers, send or just post a photo of yours , most of my 3rd gen guns havent made the move yet,(waiting on my AMSEC vault)so I'm not sure how many steps on your lever.I think all the newer guns were 4 or so but I never really counted, just matched them up. Like many, levers are plentiful, its the springs and different plungers that are scarce. Let me know. Bob

To add to someone aboves post, as far as 1-2-3 gen S/W autos go S/W used to supply our armory with all the repair parts we wanted, for any model. Even though the only S/W auto ever purchased by the city were 645s and 4506s, with a small group of 3906s mixed in as a trial, for recruits who had problems with the beretta 9s grip frame. Of course that stopped several years back,and as out parts dwindeled we finally had to adopt a policy of if you get the part and we would fix the gun .Pretty sad but often S/W wouldn't have any parts needed..
When I left, there were literally drawers full of k frame parts, I sprayed them down, lovingly and said goodby as they almost never get used, maybe a few j frame parts now and them. But even that is slight with approval of small B/U autos.
I'm sure one day some NEW OIC will figure that out and sell them to S/W or someone for STORE credit, like the thousands of revolvers we sold back years ago , and then use the money to buy bicycles or surveillance gear from S/W..Well now they do issue M/Ps so at least they could get guns (well kinda guns). My .02 Bob

My gun is a fixed up and seems good to go . I will take a black leaver or whole assembly , plungers , spring what ever [email protected]

I went up back to my range and tried her put the gun in a bag just in case , I did not want to loose my lever , it snapped right in place when I fixed it . gun was flawless the safe lever stayed in no problem.

I had my right side lever pop off last night. I was clearing it to begin some dry fire training and when the slide went forward the lever came flying off. The plunger and the spring stayed in the slide, I had to place them downward and tap to get them to come out. The spring was broken so there was no more tension on the lever. I ordered a new plunder and spring from Brownells. I could only find one plunger listed so hopefully it's the correct one. From the descriptions in this thread it looks like I might have had the old style.

Let us know if the new parts fit and if they correct the issue, then please also give us the part numbers... Looks like this may be a good combo to add to our spares box.

Unless something happened to damage the plunger, if it's just a broken spring involved, the broken spring can be replaced with a new one and the existing plunger still used.

The spring is the same for both the older and the newer ambi lever plungers. (Ought to come painted a light blue color.)

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I updated the pics in a previous post (having had to change from Photo Bucket to another hosting service when PB stopped allowing 3rd party sharing).

Also, here's a pic showing the current ambi lever plunger and spring (both new parts), as well as a manual safety/decocker assembly "body" plunger and spring.



You can see how the body plunger is thicker and heavier. It can't be compressed between your finger tips like the much lighter ambi lever plunger spring can be compressed, and it's unpainted (no "color" code).

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Thank you for the pics! My plunger and the one I ordered look like the correct ones, and the spring I ordered is blue (as long as Brownells pics are good).

My broken spring is definently not blue, not a trace, and actually reminds me of a magazine release spring. Could that have been mixed up and installed?

The two part numbers I ordered were:
Ambi M/S Body Plunger (Brownells) 940-000-574 (factory) 230150000
Ambi M/S Lever Plung Spring (Brownells) 940-000-318 (factory) 106020000

Also ordered three 11 round magazine springs. Of my three mags only one will accept 11 rounds; the other two only accept 10. The 11th will not fit. These two have springs with no color on them (and are installed correctly). The one that will accept 11 rounds has blue on one end.

Magazine Spring (Brownells) 940-000-450 (factory) 204550000

I'll keep the plunger I ordered as a spare and might order another spring. I picked up a few mainsprings, recoil springs, firing pin springs, and a firing pin. This was the first failure I ever had on a third gen

The mags for my 4006 are the same. One with a yellow follower holds 11 rounds. Two with blue followers and slightly different lettering on the housings only hold 10.


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FWIW, the 11rd mag springs can be really strong/tight and make it difficult to load that 11th round. I often had to help a few people load that 11th round, but they'll relax a bit as they're used and get easier (I didn't say "easy").

The shorter 9rd 4013TSW mag springs are not only a little shorter, but also have a noticeable upward "bend" (facing toward the front) in the top coil.

When present (depending on vendor), the 3rd gen .40 mag springs for the 4013TSW & 400X may have a light blue bit of color code paint, but the CS40 mag springs (last time I looked) are green. (Just to keep us guessing, maybe? )

There should be no difference in loading an 11rd 400X mag spring to full capacity just the follower is yellow (older) or light blue (latest revision).

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The mag catch spring is a different diameter and longer than the ambi lever plunger spring.

Yes, if someone not really familiar with the various small coil springs used in the 3rd gen guns were to look at them all in a pile (outside the gun), they can start to look alike.

I don't remember when they started to color code the ambi lever springs, so it's possible an early vintage spring might not have any paint ... but ... consider that exposure to solvents & CLP's can also rob color from springs that originally had a light paint on them.

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I don't know what the difference is but there is no way that my two blue follower mags will accept 11 rounds, even thought it looks like they should.


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I own my share of automatics with tough magazine springs and trust me, these will NOT accept 11 rounds. Here is a pic of the two springs. The one on the left will accept 11, the one on the right will not. The spring stacks up when you try to fit the 11th. Not sure what or who's spring it is. Anyway got the three factory ones on the way this week and I'll compare them all.

Good info on the mag release spring. It looks similar but I think my safety lever spring just gave up the ghost. I'm sure it's seen quite a bit of use!

My 4006 was mfg in 12/92 and is a former Tulsa PD unit.
It has no decocker.
DA only as well.
Will hold 14 in both mags.
Ive owned it about 4 yrs now.
Good shooter I enjoy it.
I just picked up a 4516-2. I posted a thread on it.


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Here's a mag catch spring alongside an ambi lever plunger spring. The smaller spring (light blue tint) is the ambi lever spring.




Sorry I can't help with pics of the 11rd mag spring for the 400X guns, but I neither own a full-size 400X gun, nor do I remember having any left-over 11rd mags in my collection of mags.

I do, however, have a lot of 9rd 4013TSW mags, and I just took some pics of some springs.

Except for the shorter spring with the follower in it, the other springs are all brand new/unused.

The shorter spring with the follower in it is from back around '06, and the other springs are new replacement spares I've ordered, ranging from several years ago (maybe the age of the used spring), up through a few months ago, and even last month. The source was directly from the factory for all but a couple of springs last month, which I added to a Midway order on impulse (marked as a factory spring).

The springs haven't changed in general appearance for several years (part # 26256), although I have no way of knowing if there's been any changes not discernible to the eye. (No revision numbers in the part number on the latest order I received from the factory, though.)

Note the upward "bend" to the top coil, presumably because the shorter & lighter slide of the 4013TSW generates some faster cycling. You can't see it in the pics, but the end of the bottom coil of the new springs I checked has a bright blue "dot" of paint on it.

The last 11rd mag springs I remember seeing when I had a mag apart on the bench at the range had "normal" coils at both ends, and I recall there being some blue paint on coils at one end. Don't remember the number of coils (windings), though.

I do remember they were generally difficult to load, and the last (11th) round could be quite difficult.

I imagine if someone were to order new factory springs from S&W, presuming they have them in-stock at the moment, the company would send whatever current spring is being used.

The pic of 3 springs includes new/unused springs from 3 different time periods over the last several years, from a couple of angles. The used spring alongside the bunched springs is off a roughly 10 year old spring and the new factory springs I received a few months ago.

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Wow there is no way you could fit a magazine catch spring in there huh? That's a definite difference. My springs should be here on Monday so I can compare magazine springs. I also have a new 4006 magazine I bought about ten years ago when I got my CSP 4006 so I'll dig it out and compare the springs.

Thanks for the info!

The 4006 CHP I received from Summit has three mags with blue followers and what seem to be springs with the upward bend in the top coil as Fastbolt posted for the 4013TSW. An older yellow follower 4006 mag has a spring without the bend in the top coil, but is noticeably longer when compared to the CHP magazines, it looks the same length as a 5906 magazine spring.

Adding to the mystery, I also noticed that Wolff sells the replacement mag springs for the 4006 under the same part numbers as the shorter 6906 magazines, rather than the 5906 magazines which are the same height as the 4006.

FWIW, the last parts list I got (2013) lists the older 4006CHP 11rd mag as using the same 9rd mag spring as the 4013TSW, part #26256 (probably at their request) ... but the 11rd mag spring for the 4006, 4006TSW & 411 lists part #20455.

We never had to replace any mag springs for the new production (mid 2000's) 4006TSW's we used for a few years, and we didn't order any spare springs. Now I wish I had one at hand to look at it.

If I were going to order new springs, I'd call and make sure the customer service person taking the order knew which model/magazine I was using, so they could check to see if any revisions have occurred.

Maybe that CHP officer on the forum will see this thread and check one of their current mags, to see what spring is being used (and count the coil windings, as that's a lot of windings in that longer spring that someone posted above).

Dunno.

However, I wouldn't rule out someone (previous owner?) having ordered/used an aftermarket spring, and gotten the wrong spring to use in those S&W 11rd mags.

BTW, the 15rd 59XX mag springs use a completely different part number. Ditto the 12rd & 15rd mag springs being different numbers for the 69XX/59XX mags.

Also, aftermarket springs may have different wire gauge, heat treat and dimensions, as well as the number of windings, compared to the factory (vendor provided) springs. Factory springs may involve one set of specs, and an aftermarket manufacturer may use different specs, but which they feel will provide the same function (even if they look different).

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The only mags I have on hand right now are yellow followers.
I just DROS'd my 4006TSW and it has 3 blue follower 11 round mags, actually everything exactly the way I turned it in, when I was issued the M&P. Unfortunately I have been so busy I just stopped into the FFL today and still have to wait 10 days. I'll break them open when I get it, but I remember the magazines were a pain to load to 11.

If memory serves me right we actually switched mags about a year or two into the TSW. The new mags were extremely hard to load to 11 rounds. Some so hard that only a mag loader UPLula would be the only way to get 11 rounds in them.