Due to all the BATFE crap on the Benelli M4, I finally sold mine.  What a shame....great shotgun, but it's just not worth risking jail time for a 2 round extension.

I'm wanting to replace it with an 11-87 Police Magnum with a 20" barrel and an 8 shot extension.  Trouble is, Remington seems to only sell them with 18" barrels.  Is there a configuration that I can buy with a 20", Rem choked barrel to use for 3 gun?

Just called Remington LE.  I guess you can't buy it, you have to build it.

Quoted: Remington brought back what was called the Compmaster in 2004. It's a 12 gauge 1100, 8 shot total capacity,  22" barrel, Vent rib, Hi-Vis sights, OD green, Rem chokes, with a black synthetic stock. This year it goes by the name 1100 Tactical Synthetic order # 26437.  MIKE.

See my other thread on this topic. Thanks.