Streamlight TLR-1s Mount for Remingtom 870

[Captains1911]

Can somebody recommend a TLR-1s light mount for an 870 Express Synthetic, 18" BBL with extended mag tube?

I would like one that works with the Glock style rail locking key on the Streamlight, that way I could easily switch the light back and forth from my pistol to shotgun.

I found these two:
http://www.midwayusa.com/viewProduct/default.aspx?productNumber=981281

http://www.midwayusa.com/viewProduct/default.aspx?productNumber=754094

[BobinLaConner]

I don't know if it fits the 870, but I used a tri-rail (several places sell them) that mounts around my mag tube on my Mossberg to hold a light/laser. Works great.

[Captains1911]

I don't know if it fits the 870, but I used a tri-rail (several places sell them) that mounts around my mag tube on my Mossberg to hold a light/laser. Works great.

This?
http://www.cdmgear.com/bmt.html

[BobinLaConner]

I have this one curently mounted with my MX6 light hanging underneath...
http://t2.gstatic.com/images?q=tbn:ANd9GcTtw1AUnB7hF5FYECGcd4W5jS_7P3Di-5px98V6ymTYTFG9BSv7mA

and then I just bought this one but have not tried installing it yet...
http://t1.gstatic.com/images?q=tbn:ANd9GcSkKfb9_XbJuQLMRAoOq0r3ROaEdr3X0 zJuYXcDKAeUOsfXpmFY

(i just grabbed the pictures off a quick google search, these links are not where I purchased)

[sdoperator]

http://www.brownells.com/.aspx/pid=32416/Product/M69_PICATINNY_RAIL_FOREND
Also, there are cheaper brands available. $130 really isn't that bad though.