bnemmie has posted photo of his shotgun with many useful tactical upgrades on Remington 870 Forum.

From bnemmie:
Figured I would show everyone mine. Standard 870 with Surefire 618LMG forend, Nordic Components barrel clamp, Mesa Tactical shell holder, Wilson Combat Jumbo Head safety with DIY heatshrink mod, Scattergun Tech. Trak-Lock Trit Sights and sling mount side plate, Brownells aluminum follower, Magpul stock, Blackhawk! sling…I think that’s it. lol. I have been working on this for years and there will be more in the works as time and money permits.

Remington 870 Tactical Upgrades

Remington 870 Tactical Upgrades