Anybody know what quad rail this is?

[Indygunguy!]

I found this photo while looking for some accessories for my AR but unfortunately the photo was on the site that sells the optic mounted on the rifle. Does anyone know what manufacturer and/or model the quad rail is on the rifle in this photo? Thanks.

 

[M67]

It's Sig's quad rail, not sure who makes it for them

PM400 11" SWAT PSB

 

[chezuki]

Damage Industries makes a very similar drop-in rail, and you can pick up a "blemished" one right now for $62.

BLEM_1913 Rail Handguard, Drop-In, Carbine AR-15/M4 | Damage Industries