UltimateGuns posted very nice pics of the home defense build on the Remington 870 Forum:

“Here’s an Ultimate 870HD build I did for a customer. It started life as an 870 Tactical, but I upgraded basically everything. I installed our Ultimate Reliability Kit, which includes the non-MIM extractor from the 870 Police model, the upgraded carrier dog spring, and a Vang Comp follower. I also added the 870P sear spring to reduce the chance of a negligent discharge. I added a Vang Comp Big Dome safety. Next, I polished the action bars and coated them with Cerakote’s MicroSlick, so it cycles like butter. I also added MicroSlick to the bolt. Next, I installed a Nordic Components magazine spring. I finished it in black Cerakote. I also installed a XS Big Dot tritium bead night sight, and a Mesa Tactical aluminum shell carrier. After the pics were taken, I added an Elzetta Alpha flashlight…315 lumens and only 3.4 ounces. Furniture is from Magpul. It came out pretty well.
Thanks,
Brad”

I really like the build which Brad made. First of all, Magpul stock and forend for the Remington 870 are the most popular and versatile ones. You can adjust LOP, add a cheek etc.

Non-MIM extractor improves reliability of the Remington 870. It doesn’t cost much but really improves your shotgun. Also, you can get Volquartsen Remington 870 Exact Edge Extractor which is as good as non-MIM extractor.

Remington 870 with Mesa Tactical Sidesaddle

Remington 870 with Mesa Tactical Sidesaddle

Carrier do spring is also improves reliability of your shotgun. It is inexpensive and easy to install.

Vang Comp Systems follower is one of the best followers on the market. It is made of stainless steel and has a hole, so you can check if your shotgun is empty by touch.

Remington 870 Police has a heavy sear spring to reduce the chance of a negligent discharge. It is also inexpensive, useful and easy to install.

Remington 870 with Mesa Tactical Sidesaddle

Remington 870 with Mesa Tactical Sidesaddle

Vang Comp Big Dome safety makes it easier to disengage it even under combat stress or when using gloves. It is very big, so I prefer the one by Wilson Combat of S&J Hardware. But there are a lot of shooters which like VCS safety.

Nordic Components magazine spring is the best one. It is well-made, reliable and strong. The price of the magazine follower spring is just about $8.

Remington 870 XS Big Dot Tritium Bead Night Sight

Remington 870 XS Big Dot Tritium Bead Night Sight

XS Big Dot tritium bead night sight is awesome! It is big and comfortable to use day and night. The installtion is easy and can be done at home.

Mesa Tactical aluminum shell carrier is one of the most reliable and sturdy sidesaddles on the market. It hold shells reliably and enables quick shotgun reloads.

So, very good home defense setup without tacticool upgrades.