Lost CHP 4006 decock lever right side

[Fastbolt]

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.

 

[mbinky]

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!

 

[P71]

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.

 

[Fastbolt]

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).

 

[piedrarc]

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.