Remington Factory 12ga Tube Extension Kits. At last Remington removed the restriction on these and offer them as a kit. None come with followers but I have followers listed in this same Category. I highly recommend the SBE followers. If you want the Hi-Viz Remington follower you will find it in this same category. I also have the Wilson Combat followers listed here as well
The Two shots fit the 18.5" Remington Barrels and ends flush with the barrel. The Three Shot fits Remington 20" barrels or longer and will end 1/2" past the 20" barrel so work fine on the longer barrels.
Yes, the parkerized ones will look fine on your Express models as the Express finish was designed to look like parkerizing. Two videos below will help you. One is on how to modify your Express the correct way and other is how to remove and install the extension so as to prevent a cap between the magazine tube and extension tube.
You get the Tube, magazine tube coupling, magazine spring, magazine extension bracket with screw and the brackets have a Quick Detach Stud for your forward sling mount. If you have a pre-90's older Wingmaster with the original barrel is will need a Pre-90's magazine bracket, so contact me by phone or e-mail and I will switch that out. The difference is Pre-90's have a longer stand off, that is the block of steel that is braised between the barrel right and barrel. If you use a modern magazine bracket it will pull the magazine tube upward at an angle. However, we are only taking about the barrel so if you are putting a modern barrel on any pre 1990's you are good with the modern magazine bracket. The modern bracket has an X stamp on it next to the bracket screw hole and the Pre-90's does not. This so knuckleheads like me can tell them apart. Well not really as I see so many I can tell by looking but not years ago when they made the change.