4006 Late style Decock only?

[Jeffytune]

Hi all.
I just saw this one on GB, it is a 4006 that were made for the Alaska state trooper.
There a bit different, in that they have a second set of serrations on the slide (A second set near the front) and the frame has the following message put on it : Caution: The decock lever automatically returns to the ready to fire position.

This would be like a Beretta 92G.

So, is this a drop in kit that can be installed on a Third Gen, or does it require machining?
Does S&W sell the parts for this or have it in kit form?
Can it be only sold to qualified gunsmiths or is it something there custom shop would have to install?

Either way it's kinda cool.

If you want to see it, you will have to go to gun broker and search S&W 4006 to see it.

 

[BMCM]

I saw that one too. I'm not entirely sure about the front serrations though. Looked to me like they were not machined at the same angle as the rear serrations. I suspect they were done sometime later.

The spring loaded decocker however is often seen on ex-LE guns. It is NOT a drop in part however. It requires a small end mill cut and a hole in the slide to make room for and anchor the spring on the replacement spring loaded decocker.

Some guns (TSW Models) came from the factory with these mods even when not fitted with the spring loaded decocker however in changing the M/S safety to a spring decocker one must check & gage the decocker timing which if out of spec will require fitment of a new sear release lever so, still not a drop in part.

Cheers
Bill

 

[TercGen]

I have also read that a 45 safety lever needs to be used with the 9/40 spring-loaded decock assembly, as it will help to keep the assembly centered. The 45 levers have an extra tab on the bottom side.

The only one I have had in hand was a 3rd Gen 9mm without the 45 lever, and that decock assembly would spring out to the left by a few mm's when released. When I broke it down, the firing pin showed a fair amount of wear and some minor peening was present inside the firing pin channel. Nothing major, but probably not good in the long run.

 

[4506517]

I have an early 4006TSW that I bought from a member. Impeccably maintained. It was decock only, but I suspect it was done later due to the fact there was no laser engraved warning on the side.