Yes, the forend is ordered.
I have a Surefire weaponlight that attaches to a rail. I have used it on my .45 (although I prefer a flashlight). It is mounted on my carbine now. It's a great light: tough as nails, two parallel batteries (better for recoil than inline), and is pretty bright (110 lumens peak).
http://www.surefire.com/X300-LED-WeaponLight
http://www.surefire.com/Remote-Switch-Assembly-for-X300
Now I have this shotgun that I want to use for defense and hunting. So it needs a light. Being a pump, I want the light mounted with the switch on the forend. The switch is separate from the light and is a few inches long. The cheapest way I found to do that is the Surefire forend.
Maybe there is a cheaper or different forend with only rail where I want the light, but here are some problems with that:
1) I don't know where I want the light and switch. Having "too much" rail allows me to try different positions and settle on what I find works best.
2) Surefire is a brand that has not let me down in the past. The older I get, the less interested I have become in screwing around. Every time I buy something that is "just as good" it isn't. I always end up spending more money getting it right that way.
Anyway, the plan is to snap off the light going hunting and snap on full covers. When I put the gun bedside, I add the light and put on short covers.
Kinda nice to be able to use the light on anything I feel like shooting.
Scott