Most of these guns look like they could benefit from a complete disassembly and ten minutes in an ultrasonic cleaner.
In disassembling the slide, since the CHP specified the special spring loaded decocker/safety body for the CHP4006TSW model so it would always be in fire mode, I would guess that the removal of the decocker/safety body may be a slightly different procedure to remove verses a normal 3rd gen decocker body?
Does anyone have any knowledge of any special instructions that may need to be followed for the CHP decocker removal?
I've taken down two 4006TSW slides (except for front sight
and extractor), and decocker disassembly is same as 3rd Gens
safeties--just keep an eye out for the additional detent &
spring that sits in slide (thanks, adrianolsen!).
On reassembly, the decocker return spring has a small leg
that extends into a locating hole in slide, to put the "return
tension" onto the return spring. Just rotate the decocker
body to point that spring leg into the slide hole as you
push decocker body into slide. Once the spring leg is
captured in the slide, rotate the decocker up to "fire"
position and continue pressing it into the slide. Easier
to do, than to describe.
One slide assembly was fairly clean under the rear sight.
The other had quite a bit of accumulated grunge; pic of
the firing pin safety plunger from that slide, below. You
won't know what's going on in your slide, if you don't
look.
BTW, the rear sights on both slides were EASY to drive off,
compared to other 3rd Gens. I was prepping one and gave
it a tap, holding the slide in one hand--and much to my
surprise, the rear sight moved. Ended up driving both
rear sights off, just holding slide in one hand and tapping
punch with dinky Lyman brass/plastic hammer.