I'd like to put my bipod on the sport but don't have a quad rail. seen short one that wrap on front sight. looks like that would work. Is that all that's available for a stock hand guard.

This is what I put on mine:
HAND GUARDS ? AR15/M4 Type Rifles - MOE® Hand Guard, Carbine-Length ? AR15/M4

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Bob | KM4DEO
Sport | Glock 22

This should work.

ProMag Picatinny Forend Rail AR-15 Universal Rifle & Carbine Aluminum

There is more out there. You actually might want to change out the handguard anyway because there is not a heat shield in the sport handguard. It really won't affect you much if you always use a bipod. But when you hold it and start shooting alot and fast it will get hot on your hands. When I get home I'll post pics of what I used to attach a magpul afg to a stock handguard. It's a polymer rail you attach to your handguard. I have since changed everything to magpul on my ar.

I put this one on:
ProMag AR-15 Bayonet Lug Picatinny Accessory Rail..
ProMag AR-15 Bayonet Lug Picatinny Accessory Rail
Currently out of stock at Midway....

Works good.......

P.S.
Here's a picture to give you the concept (not the ProMag one):

I have the OR which I think has the same handguard. I installed harris #5 stud adapter in one of the holes in the handguard to used the Harris bipod.

Harris Bipod Adapter Stud Swivel #5 AR-15 Black