They still make blued 870P's, just go check the Remington LE website. The P definitely doesn't stand for parkerized. People have occasionally tried to say the same thing about the 700P, just internet rumour.
Happy New Year y'all.
Now that you have my post up against the wall, I thought I'd try to make sense of the "P" nomenclature.
Early 2001, I had a tour of the Remimgton factory with an LE rep. Tim is his name. Can't remeber his last name at the moment. He specifically stated to me that the "P" nomenclature expressed Parkerized on all the Police parkerized shotguns and rifles.
I'm pretty sure I had and still do somewhere, an early REM LE catalog that stated this as well.
Perusing Remington's recent LE/MIL catalog, all the "P" labelled weapons are specifically cataloged to be Parkerized. (870P, 870P MAX, 7615P, 11-87P, 700P, 700P USR).
In the same catalog, they list the 870 MCS System, the 40-XS Tactical Rifle System and the M24 Sniper Weapon System
without the "P" nomenclature. There's also NO mention of any of these to be parkerized within the their descriptions.
I've handled the MCS version and I'm pretty sure it was not parkerized when I looked at. I believe the MCS system is bead blasted and blued just like the Express models sold these days. I'm also pretty sure that if the MCS system was parkerized, this would have been spelled out in the description of this latest REM LE/MIL catalog. Parkerizing is an important feature to not mention in their LE/MIL catalog. Wouldn't you think so?
So, I must respectfully dissagree with my friend Leg's opinion on the meaning of the "P" nomenclature.
However, I cannot find any credible mention on any of the REM websites to confirm this. REM may have removed all indication to the meaning of the "P" to mottle the fact that their new offerings (not the LE/MIL line of course, except the MCS, 40XS and M24) are bead blasted and blued instead of parkerized.
Also while searching, I could not find any present offerings of BLUED Police Magnums of any kind. All the Police Magnum labelled guns are parkerized it seems.